Tuning opiniun

[GreenMonster93]

Alright guys i have an 350 bored .30 flattop pistons. The cam is from the machine shop no name brand .447" lift with 222 duration at .050 lift on a 112 LSA. 14" open air cleaner. Headman long tube headers into a 2.5" dual exhasut into a magnaflow 2in/2out with dual 2.5" tips. 3.73 richmond rear end gears. Stock 4L60E trans. 275x50x15" tires and a 2/4" lowering kit.

Now i need to tune the motor to run correctly and get good fuel milage. rigt now with the stock tune the tail pipes are covered in soot and unburned fuel. I know that the old motor was way rich when i had it dynoed but the old motor also had very bad bearings... ... old owner trashed the hell out of it, but that is another story. I need to know what would be the cheapest way to get a decent tune for the truck i am not looking for the perfect tune but the best tune that will not hurt the motor becasue this is my DD.

All the help with this is extremly appreciated...!!!! thanks guys you are my ispiration to build another again...

[GreaseDog]

holy old camshaft batman!! thats a 60s grind from the L79 350 hp 327. i love the lope my 355 had with this cam. hopefully you can make it work with TBI.

[Fast305]

Originally Posted by GreaseDog

holy old camshaft batman!! thats a 60s grind from the L79 350 hp 327. i love the lope my 355 had with this cam. hopefully you can make it work with TBI.

You can, I had the hotter L-82 grind in my TBI 305.

[GreaseDog]

just out of curiousity, what are the specs on that L82 cam? i find it hard to believe that a 70s smog motor came with a hotter cam than a late 60s 327, especially considering the L82 made 190hp vs the L79s 350.

[Fast305]

Originally Posted by GreaseDog

just out of curiousity, what are the specs on that L82 cam? i find it hard to believe that a 70s smog motor came with a hotter cam than a late 60s 327, especially considering the L82 made 190hp vs the L79s 350.

224/224 @ .050, 291/288 @ .006, .450/.460" lift, 114* LSA

[go-fast]

Originally Posted by Fast305

224/224 @ .050, 291/288 @ .006, .450/.460" lift, 114* LSA

i just put this cam in my boat,awesome torque cam.this grind along with the 327/350hp is available super cheap through powerhouse.neither have much of an idle.

[GreenMonster93]

the cam i have heard is based off of the oldshool 60's corvette 350hp/327. I love the power and the idle sounds great. Right now i am running with no tune at all and base timing set at 0, and in gear with the brakes on the lope is great, it almost stalls with the wheel turned to lock, but other than that it runs and sounds great... i just think there is a lot more power to unlock with some timing and tuning. Also at idle the motor is way rich. it you place a rag on one of the tail pipes for a few seconds the rag is covered with unburned fuel. also at idle there is a strong smell of fuel for long periods of time.

[GreenMonster93]

when i asked for a cam the guy i ordered the cam from i had told him that i had a fullsize truck but wanted a dialy driver and a drop-in high performance cam that could work without a tune... also i have changed the rearend gears after i ordered the parts for the motor that i built.

[GreenMonster93]

alright guys i still dont now whether i should try to tune this by myself or buy a tune from TBICHIPS or somewhere else that i have not heard of?

[go-fast]

Originally Posted by GreenMonster93

when i asked for a cam the guy i ordered the cam from i had told him that i had a fullsize truck but wanted a dialy driver and a drop-in high performance cam that could work without a tune... also i have changed the rearend gears after i ordered the parts for the motor that i built.

seems like a strange choice for fuel injection.

[titchener]

Greenmonster, with a cam that big (compared to the stock one) its asking alot for a mail order chip company get the truck tuned correctly. It you really want it to run well you're probably going to have to tune it yourself.

A mailorder guy could probably get it at least to run better than it does now, but don't expect too much from this approach.

I bought a chip from tbichips.com when I first started messing with my L03 and it did run a lot better than the stock chip, but the engine is mostly stock, just better intake and exhaust. My car is also a California one with extra smog rules, so there was more to gain with a stock chip replacement.

You can try sending an email to the tbichips.com , tell where your engine is at now and ask what he can do for you. In my dealings with him he was straight up.

Paul T.

[GreenMonster93]

alright i see... ok if i were to tne ths my self how much and which software do i use? the tuneing of this beast is the last part of this project... so far... but i dom plan to dyno the truck before and after the chip...

[Col.Guyle]

go to www.thirdgen.org and read the stickys on prom burning. Very informative. The first thing you need to do is research all that is involved with prom burning and familarize yourself with how it works and the termanology. well worth it if you are willing to be open minded and invest the time.

[Zero260]

Originally Posted by GreenMonster93

alright guys i still dont now whether i should try to tune this by myself or buy a tune from TBICHIPS or somewhere else that i have not heard of?

I'd go with tbichips. He will burn you a prom from a list of specs you send him. It will not be perfect, and is why ppl on here badmouth him. Yet there is less than a handful of ppl on here that could possibly get a tune right on the first try.

When you get the chip, you will need to datalog how the engine runs with the equipment youre going to need to buy. You can email the datalog information to him. Brian, thats his name, will then burn you another chip with the information you sent him. If you have prom burning equipment, he will email you the updated prom calibrations, and you can burn that into the chip you have. Or you will have to wait until the new chip (prom) arrives in the mail. You will have to do this a few times, but eventually, you will get the engine dialed in.

Read his site. It tells you exactly what you need and what to do. He even has a trial version of the datalog software you can use for free.

IMO, it's worth it. D.I.Y is great, but learning on your ride could render it undriveable, or even seriously damage it. It's great to learn how, but it is very time consuming. Dyno tuning is expensive as hell and hard to find a place to tune tbi.

I've talked to the guy through email several times, and he knows his stuff. He is pretty patient and his prices are also pretty low.

[GreenMonster93]

i had called TBI Chips and they said they could get pretty close and only wanted like $180 for the tune. I plan to get the truck dynoed with the A/F ratio graph to go along. Do you think a copy of the dyno sheet will help any?

[GreenMonster93]

my question is there any other companys that burn chips or do custom tuneing that is good for the TBI?

[Pauly]

Originally Posted by GreenMonster93

i had called TBI Chips and they said they could get pretty close and only wanted like $180 for the tune. I plan to get the truck dynoed with the A/F ratio graph to go along. Do you think a copy of the dyno sheet will help any?

The WOT A/F ratio printout from a dyno run will help out a lot for teh WOT fueling. Well worth it to get that info to teh tuner.

peace
PAuly

[Pauly]

Originally Posted by GreenMonster93

my question is there any other companys that burn chips or do custom tuneing that is good for the TBI?

Fastchip (Ed Wright)
http://www.fastchip.com/

PCMforLess
http://www.pcmforless.com/
More specifically TBI tuning in middle of this page http://www.pcmforless.com/index.php?...d=47&Itemid=40


Westers Garage
http://westersgarage.eidnet.org/GM.htm

peace
PAuly