Notices

400hp reliable - rebuild renesis or go rew

Old 02-11-2017, 06:57 PM
  #1  
Registered
Thread Starter
 
Join Date: Mar 2014
Posts: 23
Likes: 0
Liked 0 Times in 0 Posts
400hp reliable - rebuild renesis or go rew

Pretty much what the title says. I've got some money put back to put into my 09 gt. Would like to make at least 350-400 to the wheels reliably.

So ideas are full rebuild of my renesis, with a turbo

or drop in a rew with a decent single and run it.

Does anyone one have experience with dropout rews? Like if I get an import one will it have any life left in it or will it need a build too.

Really biggest thing is I want to keep cruise control and be able to take the car on a trip if I want too, but It's not really a daily driver

right now it's an 85k mile renesis with compression reading at 7.5 average on both rotors with no big variances at 275rpm. I think that's on the low side, but would it be worth throwing any boost at that motor or is it a time bomb

thanks for any help
ISpoolOldSchool is offline  
Old 02-12-2017, 04:19 PM
  #2  
Registered
iTrader: (46)
 
9krpmrx8's Avatar
 
Join Date: Jan 2007
Location: San Antonio, Texas
Posts: 33,739
Liked 335 Times in 270 Posts
Try searching.
9krpmrx8 is offline  
Old 02-12-2017, 08:06 PM
  #3  
Registered
 
Join Date: Dec 2016
Posts: 27
Likes: 0
Liked 3 Times in 3 Posts
Ok well for one good luck trying to tune the series 2 ecu. It is possible to tune but more for reliability related from what ive been reading. Also there are a lot of codes we still haven't deciphered. Of course there is a work around for the ecu with is to get a haltech and start from scratch which the only person to do this with semi success was the guy down in PR. And he was having issues mostly with cooling. Cooling is gonna be your biggest hurdle to deal with. Turbos increase heat drastically and we all know thats not a good thing for our little 13b, so obviously cooling systems will need huge over haul as well as fuel delivery, oil delivery, ignition and spark. Going full race exhaust will help as well. Now for transmission we dont much about it other than it seems to hold up better than the series 1 counterpart. But in terms of how much power it can handle is unknown. Now for rebuilding if it were me doing this to my s2 on stock motor id put rebuild money aside install all supporting and necessary mods run very low boost, hope i dont go bang so i can collect information and then slowly work my way up to 8 psi and then run the car as long as possible. Once it finally goes bang. Figure out why and if it can be avoided then rebuild and fix deficiencies. Lastly if you go with the 13b-rew rebuild regardless of it seems to have life on it always start fresh imo. Hope this helps. Im by no means an expert but hopefully some one can give you a better answer
Jdmx13b is offline  
Old 02-13-2017, 09:10 AM
  #4  
Gold Wheels FTW
iTrader: (1)
 
reddozen's Avatar
 
Join Date: Nov 2007
Posts: 1,040
Liked 9 Times in 7 Posts
I don't think reliability and 400hp belong in the same discussion with the renesis block. Just isn't going to happen. I think the better question is what would be a reasonable expectation of life. I would say 40k miles tops, and that may be pushing it. Even 400hp in an REW isn't going to take the abuse forever. I recommend finding the best builder available and spearing no expense if you're chasing those power levels and reliable.

Don't ever add power like you're wanting to an untrusted / used engine. Always rebuild used crate engines from japan. Your current motor has low compression... so no, don't boost it unless you want your seals destroying your new turbo.

Last edited by reddozen; 02-13-2017 at 09:13 AM.
reddozen is offline  
Old 02-17-2017, 06:54 PM
  #5  
Water Foul
 
Steve Dallas's Avatar
 
Join Date: May 2013
Location: Republic of Texas
Posts: 2,248
Liked 157 Times in 126 Posts
RX-8
400 HP
Reliable

----------

Choose any two. The end.
Steve Dallas is offline  
Old 03-23-2017, 11:28 PM
  #6  
Registered
Thread Starter
 
Join Date: Mar 2014
Posts: 23
Likes: 0
Liked 0 Times in 0 Posts
40k miles would tickle me shitless. The car barely gets 5k a year as it is. Reliable to me just means if I want to get in it and go a few hours down the road without worrying.

I was under the impression Mazdaedit could be used to tune. I haven't read much into it yet, it'll be a while before the car gets built, but if it doesn't support much as far as logging goes I'll go another way. I've never tuned a rotary but I've done a fair share of tuning on different piston cars. I understand how sensitive to detonation these engines are.

really just trying to talk myself out of going ls because I've got a few of those already and I'm bored with them
ISpoolOldSchool is offline  
Old 03-24-2017, 09:31 AM
  #7  
^^^ Fluent in snark.
 
NotAPreppie's Avatar
 
Join Date: Mar 2006
Location: Chicago, IL, USA, North America, Earth, Sol System, Sector ZZ9 Plural Z Alpha, Milkyway, Universe
Posts: 3,177
Liked 409 Times in 334 Posts
Well, you probably won't be bored with a 400 HP Renesis.

Frustrated, irritated, homicidal... sure. But probably not bored.
NotAPreppie is offline  
Old 03-24-2017, 02:14 PM
  #8  
Boosted Kiwi
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 18,295
Liked 218 Times in 168 Posts
I have a 350-400hp renesis and have done for several years . I've gone through a few engines in the process . I have learned much and I do believe reliable is definitely possible.. In summary;for that power you need a good setup, a good tune and good fuel (I use E30) .Have a read of my build thread .

Last edited by Brettus; 03-24-2017 at 02:28 PM.
Brettus is offline  
Old 04-06-2017, 08:54 PM
  #9  
Registered
Thread Starter
 
Join Date: Mar 2014
Posts: 23
Likes: 0
Liked 0 Times in 0 Posts
I have took a look at your build thread but it's pretty long and I'm sure I've missed some stuff. How did using the middle ports for wastegate go? did you use factory style apex seals?

i was planning on pump gas and meth.

I doubt I'd be bored with a 400 hp rx8 reguardless of how it's achieved. I have an all aluminum 5.3 that I got for this purpose but I really want to put it in my xlr or my Old truck.

Last edited by ISpoolOldSchool; 04-06-2017 at 08:57 PM.
ISpoolOldSchool is offline  
Old 04-07-2017, 01:53 AM
  #10  
Zoom-Freakin'-Zoom
iTrader: (5)
 
swoope's Avatar
 
Join Date: Jan 2004
Location: orlando, fl
Posts: 14,588
Liked 24 Times in 21 Posts
Originally Posted by Brettus View Post
I have a 350-400hp renesis and have done for several years . I've gone through a few engines in the process . I have learned much and I do believe reliable is definitely possible.. In summary;for that power you need a good setup, a good tune and good fuel (I use E30) .Have a read of my build thread .
this is the most informed and honest post on this forum.

but i will ask the question.

without pinning the motor with just a plain renesis, what do you think reliable would be?

and with semi mods, what would it be?

i swear, if i could add something to my car that would be at the ~325 to the wheels, and last~ 75k miles i would be all in.. but no..

less is more. my sad life..

not around alot, but still paying attention..

beers
swoope is offline  
Old 04-07-2017, 03:01 AM
  #11  
Boosted Kiwi
iTrader: (2)
 
Brettus's Avatar
 
Join Date: Apr 2006
Location: Y-cat-o NZ
Posts: 18,295
Liked 218 Times in 168 Posts
Originally Posted by swoope View Post
this is the most informed and honest post on this forum.

but i will ask the question.

without pinning the motor with just a plain renesis, what do you think reliable would be?

and with semi mods, what would it be?

i swear, if i could add something to my car that would be at the ~325 to the wheels, and last~ 75k miles i would be all in.. but no..

less is more. my sad life..

not around alot, but still paying attention..

beers
On a stock block you can run around 300 for a fair while without strength issues .

Add rx7 apex seals and some pining and its ok till it runs out of exhaust flow .
Brettus is offline  

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.