OD's engine build
05-03-2011, 10:39 PM
#101
Thanks that makes a lot of sense. Yeah if I only had the money I put into that damn Jag I'd already have a supercharged rotary lol. I'd be interested in seeing your cribbing you put your car on. Im getting really sick of trying to squeeze under my car with jack stands and its not easy for a tall person to get in and out from under there. Could you post a pic of what you've come up with?
Yeah thats one thing I like about Pettit. They've been around for years even though I haven't. I probably wont be doing the FI direction for a couple years (promised the wife a house) it wont be going anywhere, but my wife might if I don't get her a house and stop spending money on my car. I like the idea of not having to get something rigged or custom fabricated because they don't make a part anymore. Freaken british cars. Chicks loved it though. Things we men do for....anyways.
When I get an AccessPort I'll have to see if I can get MM to lower mine to 8.5 or 8. When I'm pushing it I have a bad habit of hitting that 9k power drop. She just revs so nice its hard to keep off the gas.
Thanks again OD.
Yeah thats one thing I like about Pettit. They've been around for years even though I haven't. I probably wont be doing the FI direction for a couple years (promised the wife a house) it wont be going anywhere, but my wife might if I don't get her a house and stop spending money on my car. I like the idea of not having to get something rigged or custom fabricated because they don't make a part anymore. Freaken british cars. Chicks loved it though. Things we men do for....anyways.
When I get an AccessPort I'll have to see if I can get MM to lower mine to 8.5 or 8. When I'm pushing it I have a bad habit of hitting that 9k power drop. She just revs so nice its hard to keep off the gas.
Thanks again OD.
05-04-2011, 08:38 AM
#102
Registered
I blasted the coating off my manifold and instead draped a three-layer header blanket across the top and down the side such that it blocks exhaust heat from going up to the intake/engine bay area but still allows air to flow around and past the manifold from front to rear
Great minds think alike.
Denny, I really, really, really doubt that a double gasket is going to lower EGT's to anything useful. What are you seeing right now? And if your not recording it big brother how do you know it is doing anything. I would do what Team is doing (we do) and this reduces the amount of hit the intake manifold sees. I have found a direct coorelation between hotter ambient air temps to EGT's than anything you can do to the exhaust. Best bet is to work the timing and Lambda to lower EGT's. Again, if you're not recording EGT's than you have no idea what your experiencing. We've found an easy 100F reduction by addressing transient off throttle fuel and timing (hint hint).
Meyer out
and quit trying to invent a new wheel dammit
05-05-2011, 08:31 AM
#103
Lol--Now you know I am always going to question things and have my brief moments of intense contimplation. Hell I have to have something to daydream about while I am at work.
Yall have these nice headers see--I have the oem . Just trying to make for a little more straight pipe kinda thing before all those gases get jumbled up.
I already had another gasket lying around--so I just slapped it on there. Old school backyard stuff. Not expecting a lot from it--but it cant hurt.
I too have the blanket kind of thing yall are talking about--just built a little different since my header it different.
Since I am running the water meth i am not really worried about EGT'S that much on track. Cam has also increased the cooling capacity of the water jackets surrounding the exhaust ports..
We are working on my timing--i think i am too advanced unless I run race gas all the time. You are very correct there sir.
Sounds like map tuning is working out for you and that is great news?
Ok... data king (and you are the man) how is the ssv behaving on the track? How many open/closed cycles are yall seeing?
I swear everybody, there is something there concerning the ssv/apv associated with an FI engine.
The S2 models opens the ssv in direct coordination with the injectors. The S1 model does not. It is somewhat coordinated but not totally.
Also on the S2 model the apv's open in steps--not slam open/slam shut. S2 has 2(two) apv position sensors--one for each rotor. S1 does not.
I would love to build another intake manifold designed for Supercharger apps.
Yall have these nice headers see--I have the oem . Just trying to make for a little more straight pipe kinda thing before all those gases get jumbled up.
I already had another gasket lying around--so I just slapped it on there. Old school backyard stuff. Not expecting a lot from it--but it cant hurt.
I too have the blanket kind of thing yall are talking about--just built a little different since my header it different.
Since I am running the water meth i am not really worried about EGT'S that much on track. Cam has also increased the cooling capacity of the water jackets surrounding the exhaust ports..
We are working on my timing--i think i am too advanced unless I run race gas all the time. You are very correct there sir.
Sounds like map tuning is working out for you and that is great news?
Ok... data king (and you are the man) how is the ssv behaving on the track? How many open/closed cycles are yall seeing?
I swear everybody, there is something there concerning the ssv/apv associated with an FI engine.
The S2 models opens the ssv in direct coordination with the injectors. The S1 model does not. It is somewhat coordinated but not totally.
Also on the S2 model the apv's open in steps--not slam open/slam shut. S2 has 2(two) apv position sensors--one for each rotor. S1 does not.
I would love to build another intake manifold designed for Supercharger apps.
05-05-2011, 10:33 AM
#104
SARX Legend
iTrader: (46)
Great minds think alike.
Denny, I really, really, really doubt that a double gasket is going to lower EGT's to anything useful. What are you seeing right now? And if your not recording it big brother how do you know it is doing anything. I would do what Team is doing (we do) and this reduces the amount of hit the intake manifold sees. I have found a direct coorelation between hotter ambient air temps to EGT's than anything you can do to the exhaust. Best bet is to work the timing and Lambda to lower EGT's. Again, if you're not recording EGT's than you have no idea what your experiencing. We've found an easy 100F reduction by addressing transient off throttle fuel and timing (hint hint).
Meyer out
and quit trying to invent a new wheel dammit
Denny, I really, really, really doubt that a double gasket is going to lower EGT's to anything useful. What are you seeing right now? And if your not recording it big brother how do you know it is doing anything. I would do what Team is doing (we do) and this reduces the amount of hit the intake manifold sees. I have found a direct coorelation between hotter ambient air temps to EGT's than anything you can do to the exhaust. Best bet is to work the timing and Lambda to lower EGT's. Again, if you're not recording EGT's than you have no idea what your experiencing. We've found an easy 100F reduction by addressing transient off throttle fuel and timing (hint hint).
Meyer out
and quit trying to invent a new wheel dammit
Eric, i searched but could not find. Do you have any pictures of this setup?
05-06-2011, 07:40 AM
#105
Registered
Ok... data king (and you are the man) how is the ssv behaving on the track? How many open/closed cycles are yall seeing?
I swear everybody, there is something there concerning the ssv/apv associated with an FI engine.
The S2 models opens the ssv in direct coordination with the injectors. The S1 model does not. It is somewhat coordinated but not totally.
Also on the S2 model the apv's open in steps--not slam open/slam shut. S2 has 2(two) apv position sensors--one for each rotor. S1 does not.
I would love to build another intake manifold designed for Supercharger apps.
I swear everybody, there is something there concerning the ssv/apv associated with an FI engine.
The S2 models opens the ssv in direct coordination with the injectors. The S1 model does not. It is somewhat coordinated but not totally.
Also on the S2 model the apv's open in steps--not slam open/slam shut. S2 has 2(two) apv position sensors--one for each rotor. S1 does not.
I would love to build another intake manifold designed for Supercharger apps.
05-06-2011, 08:44 AM
#106
Un-actuate? Na thats not a new word. I used it in speaking about my wife 5 yrs ago
That is interesting Eric. Appreciate that info. Been thinking about running with the apvs shut and that is something new to consider. (Engine pulls a LOT more vacuum on decel for a brief instant lwhile they are open).
I also had been thinking of getting rid of that big ole vacuum cannister that the vdi/air pump and ssv uses since I now only use it for the ssv . Maybe going to a smaller tank would not be a smart idea.
That is interesting Eric. Appreciate that info. Been thinking about running with the apvs shut and that is something new to consider. (Engine pulls a LOT more vacuum on decel for a brief instant lwhile they are open).
I also had been thinking of getting rid of that big ole vacuum cannister that the vdi/air pump and ssv uses since I now only use it for the ssv . Maybe going to a smaller tank would not be a smart idea.
05-06-2011, 09:04 AM
#107
SARX Legend
iTrader: (46)
A few weeks ago a guy I know that was a tech inspector for Pro Formula Mazda open wheel sereis (currently STAR Mazda) told me about how those renesis powered cars would have vacuum starve issues at high loads on oval tracks. The fix was to add an accumulator of sorts. I guess what was happening was the vac was depleting AND THE VALVES WOULD UN-ACTUATE (did I just make that word up?). Perhaps you are seeing this? Plausible.
Weird you say that, old XJ Jeeps use something like this. many components rely on vaccum and they would run out so they added a little pump and vacuum accumulator.
05-06-2011, 10:32 AM
#108
A few weeks ago a guy I know that was a tech inspector for Pro Formula Mazda open wheel sereis (currently STAR Mazda) told me about how those renesis powered cars would have vacuum starve issues at high loads on oval tracks. The fix was to add an accumulator of sorts. I guess what was happening was the vac was depleting AND THE VALVES WOULD UN-ACTUATE (did I just make that word up?). Perhaps you are seeing this? Plausible.
05-07-2011, 06:39 AM
#112
good point--the oem check valve is seriously lacking though. have yall ever tested those things? not much flow at all. i took mine off and replaced it with one like the one that goes to the power brakes.
Still, like team says the system doesnt really use vacuum per say, it just uses the vacuum to move things. So the volume of the vacuum available should not change that much?
Still if the engine is unable to provide good vacuum at sustained high speeds with oem ports, now that is interesting. Tuners need to take note?
It cranks TODAY.
Just discovered my new 64 bit windows 7 system will not support my digital camera. I will have to hook up my old computer to get my pics posted.
OD
Still, like team says the system doesnt really use vacuum per say, it just uses the vacuum to move things. So the volume of the vacuum available should not change that much?
Still if the engine is unable to provide good vacuum at sustained high speeds with oem ports, now that is interesting. Tuners need to take note?
It cranks TODAY.
Just discovered my new 64 bit windows 7 system will not support my digital camera. I will have to hook up my old computer to get my pics posted.
OD
05-07-2011, 07:22 AM
#113
Extraordinary Engineering
The vacuum accumulator under the UIM is capable of operating the actuators at WOT provided that the one-way-check-valve is functional and that nothing is leaking. There really should not be much flow for the check valve to deal with.
But under WOT conditions the vacuum accumulator is on its own so any leaks will quickly shut down the operation of the SSV and VDI... just when you need them most....
The low vacuum condition in the accumulator will not create any immediate warning.
I'm planning a visual warning system using an adjustable vacuum switch and an indicator light. I'll keep you posted.
But under WOT conditions the vacuum accumulator is on its own so any leaks will quickly shut down the operation of the SSV and VDI... just when you need them most....
The low vacuum condition in the accumulator will not create any immediate warning.
I'm planning a visual warning system using an adjustable vacuum switch and an indicator light. I'll keep you posted.
Last edited by DarkBrew; 05-07-2011 at 07:29 AM.
05-07-2011, 08:18 AM
#115
Extraordinary Engineering
Once you have the vacuum switch you can hook it up to whatever you want... it's rated for over an amp.
Also the switch is adjustable for trigger point.
I was looking at small sirens capable of running off 12V as well.
I figure the entire system can be made for around $50
Also the switch is adjustable for trigger point.
I was looking at small sirens capable of running off 12V as well.
I figure the entire system can be made for around $50
05-07-2011, 11:13 AM
#116
The exgaust gasket isn't much more than 1/16" thick, not sure how you think that will do anything more than misalign the header outlet to the cat pipe. On my manifold two of the primary pipes are only an inch long if that. You are barking up the wrong tree (again).
05-07-2011, 11:21 AM
#117
However, if you have a USB cable to the camera you should be able to access the memory card by connecting the camera to the computer and pulling it up as a separate drive in My Computer to reach the file where the pics are stored rather than using the camera software, which is not really necessary.
Last edited by TeamRX8; 05-07-2011 at 11:23 AM.
05-07-2011, 12:36 PM
#118
Lol--I do bark a lot. I am slowly learning.
You do know it took me about 1 yr to learn to post a picture? Now you come with accessing a different drive etc.
My wife fell in the floor laughing when I read your post out loud.
Well finished with my Cinnamon roll and diet coke break. Its time to go fire the engine up.
You do know it took me about 1 yr to learn to post a picture? Now you come with accessing a different drive etc.
My wife fell in the floor laughing when I read your post out loud.
Well finished with my Cinnamon roll and diet coke break. Its time to go fire the engine up.
05-09-2011, 08:32 AM
#122
Well between my daughter getting "Prom Queen" ( thank God she favors her mother) and Mothers day ( my Mom was 84 last week, i was only "awarded" about 2 hrs to work on the car.
It didnt crank(;
Only getting a hit or 2 and ran the 4 yr old battery down. I was getting 12.5 standing volts from the battery but the amps may not be there for substained cranking?
Anyway it is on the charger and after work today---it will be ready to try again.
Funny, on the 1st crank i have never had a stubbon engine in this car, but it is trying.
I do have some good pics to show as soon as i can get my old not windows 7 system up as it does not support my cameras software. Maybe my young 24 yr old son will bail me out on this one. But he is pretty busy working and building cafe racer bikes.
Later tonight.
It didnt crank(;
Only getting a hit or 2 and ran the 4 yr old battery down. I was getting 12.5 standing volts from the battery but the amps may not be there for substained cranking?
Anyway it is on the charger and after work today---it will be ready to try again.
Funny, on the 1st crank i have never had a stubbon engine in this car, but it is trying.
I do have some good pics to show as soon as i can get my old not windows 7 system up as it does not support my cameras software. Maybe my young 24 yr old son will bail me out on this one. But he is pretty busy working and building cafe racer bikes.
Later tonight.
05-09-2011, 11:10 AM
#123
Wanna-be RX Owner.
Join Date: Mar 2004
Location: Seattle, WA
Posts: 130
Likes: 0
Received 0 Likes
on
0 Posts
anyone consider just setting up a standalone vacuum pump for track-day use?
http://www.summitracing.com/parts/SSB-28146/
get to the track, plug all your vacuum lines into it, and never worry about issues with vacuum (even have brake booster with throttle on, if that means anything to you).
I'm sure its loud so it wouldn't be something for daily driver use...
http://www.summitracing.com/parts/SSB-28146/
get to the track, plug all your vacuum lines into it, and never worry about issues with vacuum (even have brake booster with throttle on, if that means anything to you).
I'm sure its loud so it wouldn't be something for daily driver use...