http://community-2.webtv.net/StreetL...ojectConanthe/

Check out the above link. Boosted TBI project underway.

 

TTT

 

Thanks Dimented. I don't know why this webtv system doesn't allow me to post new threads. It only allows me to respond to threads already posted for some reason (must be the dust, from sitting in the closet all these years lol). I need to get my PC up and running asap. It's only been down a few days, yet feels like an eternity....

 

dimented, did you bring this back up so he would start working on it again?
I'd like to see the finished project.

Steve

 

Hey Steve. I'm having a little trouble starting posts, and I asked Dimented if he would start one for me. I believe he borrowed an older, irrelevant post from long ago, and converted it into mine (hence the '05 date). This project is only a few weeks old, and I'm hoping to have it wrapped up soon....

 

Yea, I couldnt do much about the date, lol...

 

I kind of thought that's what was going on. Just had to take a jab, you know how we are here. I do look forward to seeing the progress as you complete what seem to be a very nice project.

See yah.

Steve

 

Thanks Steve. I'll be documenting everything as I go. So far it's been surprisingly cheap, car included. I have a lot more parts waiting to go on, but I'll obviously update the site the moment I get some pics of them....

Fast355 has got me contemplating those ZZ4 heads that he's been raving about. Got a few ideas on the camshaft, but obviously can't order yet until the heads have been decided on. Tuning this thing w/the turbo is going to be very interesting. Think I'll have to kidnap Dimented, for at least a week or so....

 

Actually, Ive never tuned with boost before. Grab your duct tape, rope, and magazine trimmings ransom note and snag Fast355 isntead Hes tuned with a blower.

Have you decided on the FI setup yet? Id be sort of leaning toward speed density. Its sort of hard to say how the MAF would react to it. Putting it pre-turbo could cause some issues due to the fact that air can collect in the intake under boost before it enters the motor. Post turbo may cause issues with the potential for a constantly changing heat transfer coefficient, not to mention that the MAF would probably cook to death under boost without an intercooler.

Also, just out of curiosity, will this be a single turbo setup being fed by both cylinder banks, or dual turbo?

 

im pretty sure hes going with a single turbo.
heya street once i get my new intercooler ill gladly give u my current intercooler to use on this if u dont have one or arent planning on getting one

 

btw if u need some other stuff i have some parts left over from the sbc i had acquired to put in the rs before i decided to turbo it,i was gonna get ready to throw the stuff out.
ive got a moroso elec water pump
nicely ported 882's
flywheels
few dizzys
and im not sure what else
sad thing is last week i threw out a nice turbo cam

the above stuff u can have if u want it
ive also got a 2,500 stall converter if ur interested but i dont remember if u were putting a 5 speed or an auto behind this

 

Hey guys. This is definitely going to be a single turbo set-up. I contemplated running a Speed Density tune, in fact, I ran it on my LS1 for awhile, but immediately went back to Mass Air Flow (personal preference).....

Intercooler is a definite, in fact, I'll have pics of it posted up on the website very soon. Have some more things being added this weekend, just need to take a trip to the bone-yard for a serpentine set-up....

Dave's stock MAF oriented system, although limited, seems to read boost pretty well, with no problems, for a "stock" system. Definitely will be running your (Dimented's) PCM/MAF concept, just waiting for the engine to get finished up....

Dave, talk to you over the weekend. Lemme know if your headed to the track this Friday night....

 

The nice thing about the MAF is that it will calculate teh fueling correctly no matter how much boost the engine makes as its not looking at pressure, but mass air flow. The only real issues are the redundant speed density and timing. This was originally designed for NA engines. With the single bar MAP, if the MAF fails, youll only have fueling up to 1 bar. Good enough to get it off the road, or limp it home, but you wouldnt be able to drive it normally like that. With the timing, it also stops at 1 bar. There are other things that youd want to disable or tweak, such as pseudo-baro and such, but it should work ok.

Basically itll work like a carb and vac adv. distributer on an old school blower setup.

As for the MAF, ideally you want to put it as close to the throttle body as possible, but Im not sure how it will respond to boost. If others have run the MAF post turbo, then it may be ok. Youll know right away if its working properly or not. Once the MAF table is calibrated, the desired and actual AFRs should be within a few perent of eachother at all times under steady loads. If its erratic or the fueling error seems to drift, then the MAF cant work under boost.

 

That throttle body is cool, how difficult was it?

 

This is where that boost PW multiplier table in the EBL will come in handy!

 

Not difficult at all, just time consuming. If you decide to go that route, just take your time with it, and if you have any questions, don't ever hesitate....
----------
Been contemplating this as well, and I agree. Will know for sure which route I'm headed (in reference to the ECM) once the engine gets back from the shop, installed, and started....

 

Weather has been pretty bad out lately, and I'm anticipating when we all can head out to the track and discuss. Once the engine gets back (it's getting notched, just in case the need to stroke it suddenly makes itself known), it's just a matter of days before it all comes together....

I kid you not when I say that I need you over here for that, as although I'm pretty fluent with tuning, I know I'll overlook something, and it's clear to me that your a great deal more in the know. Don't worry, I'll have plenty of food and drink lol. Although the engine is definitely getting boosted, will initially have it running naturally aspirated to work out the bugs....

Site is being updated this week w/more pics, and I plan to have plenty of vids for those who want to see her tested and tuned once running. Been SERIOUSLY thinking about a friend's Muncie four speed, but again, it's all up in the air yet (more on the stalled automatic side). The rear is the next thing to go, so for those who never "seen" a rearend removed, fuel tank lowered, Walbro fuel pump as well as a 12 Bolt Posi installed, should enjoy....

 

I could stop by at some point over a weekend when the weather is a little more favorable and help get it going.

As for the trans, if your running boost, the auto is the way to go IMO. No worries about constantly needing transient fueling or having turbo lag. Manuals make things alot harder to tune. Your contantly opening and closing the throttle during normal driving, which can make things a real drag if everything isnt tuned to perfection, especially in the winter.

 

hey man the shop is empty all this week/weekend if u need i can get u in to start fabing the turbo system

btw have u decided on what ur doing with the 3.1/t5 setup?