turbo tuning help!!!

demon1018 · Posted: Wed Apr 08, 2015 2:24 pm Post subject: turbo tuning help!!!

ok im a fabricator not a tuner so bear with me please... we put this t 3 turbo on a 64 bug with a 2110 motor that we really dont know whats inside it... we had the turbo rebuilt and a carbon seal installed. it has a weber side draft. i pulled it apart and cleaned it ...looked good . one of the squirters was cloged but cleared it right out. . got it running today . and it has a bad stumble when you hit the gas...give it a couple of pumps and it goes. not sure what to do about that. it has a msd distr in it and i have it set at 8 degrees initial and 25 total ...there is no boos retard on this now. i dont have a oxygen gauge on it yet either...its coming. we are trying to get it to a show this weekend and i have 1 more day to do what i can . it still detonates when it starts boosting. more in second or third then in first. not sure if its a fuel prob or timing. i know i need the gauge to really know but wanted to see if anybody could set me strait as close as we can get with out it . really appreciate any advice

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demon1018 · Posted: Wed Apr 08, 2015 2:28 pm Post subject:

https://www.facebook.com/video.php?v=8180651949283...tif_t=like

heres a link to a vid of it running

rs58rag · Posted: Wed Apr 08, 2015 2:38 pm Post subject:

What jeiing? acc. pump jet size? Is fuel pressure regulator set up boost sensitive?

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

Boost referenced FPR?

http://www.pacificcustoms.com/mm5/merchant.mvc?Scr...ange_high=

Also, I assume that carb has the turbo emulsion tubes?

demon1018 · Posted: Wed Apr 08, 2015 2:50 pm Post subject:

if its draw thru i thought the boost referenced fuel pump was not needed?
i have no ide what jets and what not are in the carb ..but i can check..what should be in there?

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

Fuel pump is static. Regulator is rising rate.

Miss Cleo couldn't answer your last question unfortunately.

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

Sorry, let me add.. no one can "jet" your carb/motor for you without knowing the full spec of your motor. Stroke/bore/compression/heads/cam etc etc.

demon1018 · Posted: Wed Apr 08, 2015 3:43 pm Post subject:

i understand. ive done some v8 blow thru setups that we used boost referenced regulators... but thats because the fuel would b pushed back if it didn't have it. this carb is not pressurized so why do you need it? remember im a fabricator!

demon1018 · Posted: Wed Apr 08, 2015 3:46 pm Post subject:

demon1018 · Posted: Wed Apr 08, 2015 3:47 pm Post subject:

it had duel carbs on it

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

demon1018 · Posted: Wed Apr 08, 2015 5:02 pm Post subject:

on a v8 with a carb they are usually 7 to 8 psi ... this bug has an electric mr gasket , i think, fuel pump... not sure what it puts out . so if i were to use a holly blue pump or even a red pump then it would be fine?

rs58rag · Posted: Wed Apr 08, 2015 5:20 pm Post subject:

Your
compression ratio may be too high and/or jetting may be lean causing the detonation.

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

itsmebryan · Posted: Wed Apr 08, 2015 8:33 pm Post subject:

I have a turbo Subaru's and have tuned it. First what boost are you running? You must get a wideband O2 and you are probably running too much timing. Under boost I run around 15 degrees adv on e85 and on 91 octane around 11. (I run 20psi). You need to retard under boost.
Also having your AFR at 11 or richer under boost is a good starting point.

demon1018 · Posted: Thu Apr 09, 2015 2:01 am Post subject:

Thanks for the help.. that makes sence now. But does more pressure = more flow? If it puts out 3 1/2 psi to a #8 line, does it make more fuel come out if the pressure rises? I pulled outthe jets and the main jet is 175, the emulsion tube is f11, and the jet on top is 170... thats the air bleed right? Need to get some parts and start playing!!

demon1018 · Posted: Thu Apr 09, 2015 2:24 am Post subject:

The waste gate spring is supose to be 8 psi but ive only seen about 5 or 6 before I let off. Its hard to see it when it happens that fast!!. The idle jets are 60f8 and the venturies are 30.. does that sound ok? It runs and idles fine... thinking the main jets need to be bigger but I know withou the gauge its just a guess. What does the top jet do on the emusion tube?

Dauz · Samba Member Joined: January 05, 2010 Posts: 1790

I have an Innovative Motorsports LM-1 wideband for sale in the classifieds should you want to go this route. You'll need an O2 bung put in your tail pipe 6 inches from the turbine and not below the 3 and 9 o'clock position on the pipe.

About your carb, call Carcraft and talk to Ron or Shane about the setup. They turbo prep the DCOE 40s in all their kits.

Brian71 · Posted: Fri Apr 10, 2015 3:37 pm Post subject:

What size fuel line are you using from the tank to the back of the car?

demon1018 · Posted: Thu Apr 16, 2015 1:25 pm Post subject:

all right got the gauge installed and found that when it boosted it was running real rich.its close. sounds crazy!!we bought some jets and here are the issues now.
Slow cruising the gauge says about 11. Before it was off the gauge rich...-10. We had 60 f8 idle jets and now they are .045. Better but I think I still need smaller right? It still has a slight hesitation off idle. It is much better with the dist locked out and set at 22 degrees. I put the blocked pump exhaust valve in but it really didn't seem to do much. I think I just need a bigger pump jet?? It has a 40 in it now.what should i get? When It makes boost the o2 gauge reads about 14 now. It had 175 mains and the gauge was at 10 when It made boost .now it has 155 in it so I'm guessing 165 jets Would be good?? The air correctors are 170. Would it be better to change these? The venturi size are 30. It runs very well. Any help would really be appreciated. Thanks!


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