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Old 02-22-2005, 01:06 PM   #1
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Turbo 8 Application Curiosities

OK... first I would like to say I have absolutely no business being in the Major Horsepower Upgrades area... I dont even own an 8 yet. With that said, there are some areas which I would like to see adressed perhaps in a sticky...here's what comes to mind.

Fuel Delivery: What modifications are required/provided with turbo kits(i.e. Greddy) to bolster fuel delivery during boost. My HRC kit on my 420, for example, supplied an aftermarket FPR and secondary in-line 255lph fuel pump.

Air/Fuel: What modifications and/or piggy backs are required to fool the ECU? On the Eclipse, we had to install a voltage clamp device between my MAP Sensor and ECU in order to fool the ECU to go into WOT fuel delivery during boosted operation, while keeping it from seeing voltages outside of it's operating range.

Tolerances: Unfortunely, somebodies going to have to break some stuff to get an idea for real world operating ranges, but I'm curious as to what the factory motor can handle in terms of boost, and what the factory drive train can handle in terms of HP/Torque.

The Greddy Problem: It seems like people are having a tunning issue with the Greddy system. How is it being resolved?

I'm sure there's a million more questions, and these are probably already answered here to some extent, but just a suggestion if somebody wants to complile the info.
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Last edited by string theorist; 02-22-2005 at 01:22 PM.
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Old 02-23-2005, 05:31 PM   #2
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dont feel bad-i don't own an 8 either....and i've already done 3 porting jobs on them. LOL
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Old 02-23-2005, 09:39 PM   #3
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^^what ecu did they use to tune the fuel on the port jobs?
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Old 02-23-2005, 10:30 PM   #4
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Quote:
Originally Posted by army_rx8
^^what ecu did they use to tune the fuel on the port jobs?

we didn't even get around to tuning the small ports. the motor is in my garage again just waiting on the o-rings for the big port job...that should probably be all the motor work we're doing for a while. snoochie's got the canzoomer, so after the motor is broken in and dyno'd with the big porting, we'll put that on and tune it...see what it can do then.

i think we should be able to get 60-70 rwhp increase with the porting, ecu and cat removal...not too shabby. we'll probably go turbo one of these days too.
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Old 02-25-2005, 05:48 PM   #5
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cool...but i wouldn't think it would work all too well with out fuel managment...hehe but i don't knwo much which is probable why i'm not a tuner:p

one of teh othe guys who ported his engine got about 60 whp out o fit. not bad at all
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Old 02-25-2005, 06:56 PM   #6
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we're hoping to get about that with the tuning.
who was it?
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Old 02-25-2005, 08:52 PM   #7
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hmm if memory serves me (which it normal doesn't:p) it was judge ito...haven't seen him around lately though
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Old 02-26-2005, 01:06 AM   #8
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Consider what you just said. Ito = not very reliable
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Old 02-26-2005, 01:40 AM   #9
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did we ever solve the dilema of ito vs. mr. pn'p?
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Old 02-26-2005, 08:25 PM   #10
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jesus christ, I haven't dug through the porting thread cuz its just too massive

60 hp gain?

Anybody ported with a turbo?
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Old 02-27-2005, 01:31 AM   #11
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Nobody has ported with a turbo. GuitarJunkie offered to port someones turboed 8 for free but no one was willing to do it.
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Old 02-27-2005, 12:52 PM   #12
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Nobody has ported with a turbo. GuitarJunkie offered to port someones turboed 8 for free but no one was willing to do it.
are you SERIOUS ?

I'd do it . . . where is he?
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Old 02-27-2005, 12:54 PM   #13
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^ untrue accusation! perhaps there is some who would be up for it if the were just a little closer. no response doesnt mean unwilling.
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Old 02-27-2005, 01:02 PM   #14
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Quote:
Originally Posted by guitarjunkie28
we didn't even get around to tuning the small ports. the motor is in my garage again just waiting on the o-rings for the big port job...that should probably be all the motor work we're doing for a while. snoochie's got the canzoomer, so after the motor is broken in and dyno'd with the big porting, we'll put that on and tune it...see what it can do then.

i think we should be able to get 60-70 rwhp increase with the porting, ecu and cat removal...not too shabby. we'll probably go turbo one of these days too.
When you say big ports, what are you planning? I don't think I've seen a reference to this on the other thread so I'd like to have some idea of what you have in mind. I take it you plan to replace the exhaust sleeves/headers with some new design as well?
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Old 02-27-2005, 01:52 PM   #15
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True I'm just saying nothing actually came of it. He's in socal too, hesperia to be specific.
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Old 02-27-2005, 02:45 PM   #16
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what i'm planning on for the mecca-porting is going right throught he water jackets on 2 sides of the port and getting it welded back up.. i can imagine why people would be hesitant to do this--who knows if the weld will hold under the exhaust heat?

so even though the labor is free, i'm not gonna give a warranty on that. whoever chooses to go that route will go into it knowing they're being a guinea pig. but the worst that would happen is the motor would eat coolant and there's $800 for a new pair of irons...not the end of the world.
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Old 02-27-2005, 03:07 PM   #17
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Quote:
Originally Posted by guitarjunkie28
what i'm planning on for the mecca-porting is going right throught he water jackets on 2 sides of the port and getting it welded back up.. i can imagine why people would be hesitant to do this--who knows if the weld will hold under the exhaust heat?

so even though the labor is free, i'm not gonna give a warranty on that. whoever chooses to go that route will go into it knowing they're being a guinea pig. but the worst that would happen is the motor would eat coolant and there's $800 for a new pair of irons...not the end of the world.
The irons are only 800 bucks?

I didnt realize that.

Have you worked on any of the 2k5 engines? I've heard a little something about the irons and possibly even the rotors being cast from a different blend of materials.. Wanted to know if there was any truth to tha.
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Old 02-28-2005, 08:51 AM   #18
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^^^
That's interesting Ajax, where'd you hear that rumor?
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Old 02-28-2005, 09:53 AM   #19
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does mazdatrix sell the side housing and intermediate housings? (they are a lill more tha t400 each but i'm sure you can get them cheaper):D
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Old 02-28-2005, 02:40 PM   #20
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Quote:
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^^^
That's interesting Ajax, where'd you hear that rumor?
I'm not at liberty to say where I heard it.
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Old 02-28-2005, 02:40 PM
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