Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Do I need PCM tuning for this?

Old Feb 29, 2004 | 06:36 PM
  #1  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
Do I need PCM tuning for this?

When i get my LT1 and get an LT4 hot cam will i need PCM tuning?

I read at someones Car Domain page they were running real rich(would it be becuase his formula was a 93 with speed denisty) and went from 285rwhp to 315rwhp only with the Lt4 hot cam and a rear end gear change?(from 2.73 to 3.42). Would it be because his setup was speed denisty? Will MAF act the same way? Or was this only happening to him because he did something?

I'd like to know this simply because computer tuning is fn expensive. TPiS wants $575 bucks for them todo what i want. Thats crazy.



Thanks, Shane

P.S. Here is the cardomain page-
http://www.cardomain.com/memberpage/428479/1
Reply
Old Feb 29, 2004 | 06:46 PM
  #2  
Nixon1's Avatar
Supreme Member
 
Joined: Jul 2001
Posts: 3,931
Likes: 0
From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
I'm no expert on GM V8's but I imagine the computer should handle it just fine being an MAF setup. If it does get a little on the rich side, install an AFPR and compensate manually. It's a hell of a lot cheaper. It may be the dirty way to get the job done, but hey, it works.
Reply
Old Feb 29, 2004 | 06:47 PM
  #3  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
AFPR, uhhhhh what is that. As long as it gets the job done i'll be happy. As soon as i get my show car ready thats when the appearance comes into play. This will be a show car once done.




Shane
Reply
Old Feb 29, 2004 | 06:59 PM
  #4  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
well actually i have been reading review about one place -
http://pcmforless.com/

And the reviews on these peoples work is astouding. The guy i was talking about before got his chip done by them and said that there was so much of a difference in performance that it was pretty much mind blowing. He said he'd forgotton how good it ran before then once he changed it how crappy it ran.

Best of all OBD1 is only $99 for all the reprogramming you can tell them todo. That makes it very affordable.

here is what the guy said about he chip on his car domain

Remember how I didn't get the results I was looking for after the head work? Well, I figured the problem would be one of two things. Either my transmission was taking a dump or my ECM was in need of some serious re-programming.

For the longest time people had been suggesting I get a custom program but I kept putting it off due to the fact that I had seen/known too many people getting horrible results from "custom" chips/programes that ended up costing them theire vehicles drivabily and/or masking one problem but creating another at the same time. Up until I did the cylinder heads, my car ran great with the mods I had done, so I just didn't see the "need" to upgrade the chip. After the poor results at the dyno with the heads though, I came to the conclusion that I had surpassed the factory ECM's ability to "learn" and "compensate" for new mods.

After a lot of research, I decided to go with progamming from PCMFORLESS.COM . I had heard many good things about them from others so I decided to give them a try. They responded to all my emails within an hour and told me that on average custormers would see a 3-5 tenth's reduction in 1/4 times and much improved drivability with their "LT4 HOT-CAM" tune. I was sold.

I filled out their applictaion with a list of all the mods I had made. Within three days, I had my chip delivered to me at my work.

I never had time to put the car on the dyno 'cause winter was right around the corner and besides, I didn't have insurance, so I didn't want to take the chance at getting pulled over on the way to the dyno, so I just drove the car around the neighbourhood.

I can't guarentee everyone will get the same rusults I did, but for the record, I was just blown away with the difference in the Formula's performance.

The first thing I noticed was that the exhaust tone was different. It sounded more refined. Less raspy. I shifted the tranny into reverse to get out of my driveway and for the first time, it actualy moved under it's own power ! It never did that. Not even when it was stock. I'd always have to give it gas to get it to move while in reverse. Not so, with the new chip. I only had the car on the road for 5-10 minutes but in that time I got to lay into it a few times and the car responded in a BIG way. I could feel the increase in Torque throughout the rev range. BIG improvment.

Best of all? The car ran soo much smoother than before. Almost as if it were stock again. I had forgotton how smooth she ran when I first got her. The drivabily was reduced with each passing mod, but because the mods were gradual throughout the years, I hadn't really noticed it 'till I had the new chip. It's amazing what a good tuning will do for a car's performance.

With the origional factory chip I had to drive the car around for a long time whenever I unpugged it or disconnected the battery 'cause the car would run like crap. It'd be a good week before the car would run properly again. I know that my new ECM works the same way, so performance/streetability will only be getting better the more I drive it. I can't wait !!
Reply
Old Feb 29, 2004 | 07:01 PM
  #5  
Nixon1's Avatar
Supreme Member
 
Joined: Jul 2001
Posts: 3,931
Likes: 0
From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
AFPR = Adjustable Fuel Pressure Regulator. You install it in place of the stock one. They should sell it for your motor as a direct bolt in I imagine. It works like the stock one to regulate your fuel pressure, but it's got an adjustment screw up top so you can regulate the amount of fuel that passes through it. Hook up a fuel pressure gauge to your schrader valve and, if you know FOR SURE you're running rich, back the fuel pressure off 1-2 psi and see what happens. On a fuel injected motor with around 40 psi stock, even a few psi can make a big difference. I wouldnt recommend dropping it any more than 3-4 psi below stock...and I'd say 4 psi down is pushing it if you know what I mean.
----------
Lol yeah, a chip will make a big difference. If you can get one that cheap, sheesh, do it man. I've been looking at $300-$400 bills...but thats for a dyno-tune with a chip. Little different. I need one bad. I've gone from about 190 rwhp to about 290 rwhp on a stock chip. Real rough operation and lots of surging.

Last edited by Nixon1; Feb 29, 2004 at 07:04 PM.
Reply
Old Feb 29, 2004 | 07:16 PM
  #6  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
yeah, the guys i've talked to so far about these peopel recomend them to anyone who ever asks. I guess this would mean they ahve some stuff to be rocconed with. I think that these people are gonna be the best, i mean its only $99 bucks for them to program my PCM once, and after that for a month if there are any problems i send it back(free shipping) and he reprograms it for free the first month. That sounds like an awesome deal to me.



Shane
Reply
Old Feb 29, 2004 | 07:19 PM
  #7  
Nixon1's Avatar
Supreme Member
 
Joined: Jul 2001
Posts: 3,931
Likes: 0
From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
That's a heck of a deal. Shame...looks like they only do OBD systems. What about the Ford guys? EEC-IV isnt that different!

Yeah go for it man..even if it's not the BEST tune, it'll still be worth the $100.
Reply
Old Feb 29, 2004 | 07:21 PM
  #8  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
yeah well he says if your not satisfied with what you got, you tell him, send it back, and he reprograms that part to fix the problem. He does reprogramming free for two months after you recieved your product. This seems to me the best way you could possibly do it. Might be just as good as a dyno tune if you come back to him and tell him whats wrong, he can then fix it.


Shane

Last edited by therckid; Feb 29, 2004 at 07:24 PM.
Reply
Old Feb 29, 2004 | 07:23 PM
  #9  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
wait scratch that he reprograms for 2 months. I dunno what i was thinking.
$99 for programming and 60 day free reprogramming, $50 for reprogramming thereafter

Shane
Reply
Old Feb 29, 2004 | 07:24 PM
  #10  
Nixon1's Avatar
Supreme Member
 
Joined: Jul 2001
Posts: 3,931
Likes: 0
From: Palm Bay, Florida, USA
Car: 95 E-150 & 07 Kawasaki ZX-6R
Engine: A slow one & a fast one
Transmission: A bad one & a good one
Axle/Gears: A weak one & a chained one
I dont think it'll ever quite be as good as a dyno tune....a GOOD dyno-tune anyways. You can do a lot on a dyno. And you can actively track how different timing curves and fuel maps affect the motor. But a remote tune like that place, as long as you give them accurate information and tell them just what you've got, and they know what theyre doing, should work plenty fine.
Reply
Old Feb 29, 2004 | 08:21 PM
  #11  
therckid's Avatar
Thread Starter
Banned
 
Joined: Jun 2003
Posts: 2,795
Likes: 0
From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
wellyeah but all you do is tell him ever single modifacation you have made that in any way could effect the engine, and he perscribes what would work best for your engine, you install it and you are ahppy or if your not you send ti back to be reprogrammed, for free.



Shane
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Zell1luk
TPI
0
Sep 29, 2015 10:36 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 09:49 PM.