3.4 DOHC turbo

[timg]

Here's a link to my post on mymonte.com. I'll repost the text here, but the pics took way too long to get uploaded over there and it's not just easily transferrable html code. Enjoy!

http://www.mymonte.com/shwmessage.aspx?ForumID=7&MessageID=215921

I have a lot of old threads on this and a bunch of scattered information, but no common thread with everything. IMO, this is almost perfect for a 3.4 DOHC turbo setup and is what I wanted from the beginning.


Setup info

T04E 60 trim turbo with tangential T4 exhaust housing

Turbonetics Deltagate 5-7 psi wastegate

1st generation DSM BOV

ADFX racing 1G DSM intercooler 7.5"x3"x24", 2.5" in/out http://www.adfxracing.com/default.as...&category_id=2 with custom hood support welded from 1"x1"x1/4" angled steel

Vortech 12:1 FMU

Split Second FTC1 (ability to retard ignition timing and alter MAF signal based on boost/rpm) http://www.splitsecond.com

Manual fan switches mounted in side of center console

Redline Water Wetter

2.5" mandrel bent/press bent downpipe

3" with 12" Borla muffler to dual 2.5" with dual Magnaflow XL mufflers exhaust (3" highflow cat or 3" test pipe)

Autometer Carbon Fiber a/f ratio and boost gauges in a custom molded Honda Accord 2 gauge pod

MAF mounted before throttle body

BOV mounted before MAF

short radius rubber 3" 90 on end of turbo to 3" silicone 90 to filter in the fenderwell

new windshield washer pump and reservoir

Rebuilt transmission with all HD parts, transgo shift kit, and quad4 torque converter


Boost comes quickly. From a stop it's at full boost in less than a second. The new intake is the ultimate setup IMO. I tried running 3" carb piping to a filter in the fender and also a 4"diax2" thixk 1bbl or 2 bbl carb filter directly on the turbo and neither flows nearly as well as this setup. Spool time increased significantly with the 4"x2" filter and ultimate power also suffered dramatically. The exhaust changed from a 2.5" to dual 2.25" press bent to a 3" to dual 2.5" mandrel bent setup. The new setup is far superior to the old one. The FTC1 is retarding timing by 1 degree at 7 psi and 1 degree per pound of boost above that.

If you have any questions, feel free to ask. I have some old videos and quite a few high res pics if anybody is interested.


Exhaust

http://www.mymonte.com/shwmessage.aspx?forumid=7&messageid=212666

Split Second FTC1 install

http://www.mymonte.com/shwmessage.aspx?forumid=7&messageid=214044

Tim

[napatiger]

RE: 3.4 DOHC turbo

All I can say is DAMN I wish I had your setup

[LoominaZ34]

I noticed you said you were running a MAF. i've read you really can't crank up the boost that high if you're only monitoring mass air is there any advantage to not using a MAP? I'm terribly interested in tubo-ing my car someday. and i'm trying to learn all I can

[timg]

there are lots of tricks around running a MAF with lots of boost. I'm using a MAF not a MAP because that's what my car came with. My stock computer will not understand a MAP sensor and with a MAF it doesn't care that it's boosted. I do have a piggyback with a MAP that allows me to alter the MAF signal. I'm guessing that you have an earlier 3.4 with a MAP. There is the possibility of retuning the ECU for a larger MAP sensor or tricking it into not seeing any boost and adding fuel with an FMU.

Tim

[5SpdGTP-91]

Are you using stock internals?

[fieromadman]

did you ever contact Ryan Gick at www.gmtuners.com? He burned a chip for me for the 94-95 PCM. Im still beta testing with the fiero but im sure that he could at least get you one for the auto because it is much less complicated. Looks good man, how much you got into the turbo setup?

[Froggx]

That thing sounds awesome. Per chance do you know the a/r of your exhaust housing? Also, has this monster seen a track or dyno yet? I'd be interested in seeing how well it works.

[mfewtrail]

That thing sounds awesome. Per chance do you know the a/r of your exhaust housing? Also, has this monster seen a track or dyno yet? I'd be interested in seeing how well it works.

I asked the same thing at the W-body board and I believe Tim stated that it was a .68 A/R housing.

[timg]

Stock internals. It should be a 0.68 a/r turbine housing. No times or anything yet, but hopefully soon. I will be contacting Ryan Gick about that chip soon. It sounds like he can probably take care of everything I would like done!
I've probably got about $4k in it now since the piggyback, new exhaust, and new intercooler piping.

Tim

[pontiacjeff]

I am using a similar turbo on my 96 3.4DOHC. Only mine has the .80A/R turbine housing and a modified GT35 turbine wheel. The comp is a .60A/R T04E with a 62-1 wheel.

I will also be using MAF, but I'm up-sizing to an LS1 MAF and using GMPCM software to tune it.

[Synestral]

Tried the link to the mymonte site, and they didn't work. Maybe they're working on the site, so I'll try later.

[your_I.D.]

Tried the link to the mymonte site, and they didn't work. Maybe they're working on the site, so I'll try later.

same prob for me.

[timg]

Dyno results are in. 263 wheel horsepower at 7 psi. I've posted the best pic I can (it's small). If anybody wants a larger, higher quality one- e-mail me.

http://www.w-body.com/forum/viewtopic.php?p=350133#350133

http://www.cardomain.com/memberpage/719379/4

Tim

[pontiacjeff]

That's greta Tim! That's MORE than 50% more power on LESS than 50% more atmopheric pressure. In other words, theoretically you'd make 249whp on 7psi from the stock 166. I have seen this on DOHC engines. they are very inefficient on natural aspiration! it really takes a turbo to make a DOHC head shine! On 10-12psi, you'll be way over 300whp.

I am shooting for 350-375whp on 15psi in mine... if I ever get it finished.

[pepsi_coke]

Hey Tim, so your letting the stock computer (no mods to chip) run the turbo?

Also, hows the MPG? Drop a lot/little? Or barely noticeable?

Thanks,
Jay