What is the limit of the stock PCM?
What is the limit of the stock PCM? just out of curiousity, ive heard that your limited to about 900 rwhp on stock computer.
is this true, or is anyone making more power?
TIA
is this true, or is anyone making more power?
TIA
most are limited when using the MAF (well just one stock one) to 60lbs a minute of air.
there are ways to tweak past that though.
if you have a 3 bar sensor then youd be limited to 29psi and how ever much HP that makes.
there are ways to tweak past that though.
if you have a 3 bar sensor then youd be limited to 29psi and how ever much HP that makes.
I do not have the car back yet. Allan is running the exhaust back now and should be putting some milage on the car. He told me he should be getting some video for me at the end of the week...
hes using a 3 bar map sensor on my setup with the 75# injectors.
he said he wasnt too sure what the setup will produce, but were hoping for at least 825-850 rwhp.
theres gonna be three different setups from what I understand.
1. pump gas (91) minimum of 11.6 lbs ( that is the minimum the wastegate will hold)
2. combonation of race fuel and pump gas(not sure what oct) will run between 15-19 lbs
3. race fuel only- he said hes gonna try to run over 20 lbs(not sure how much more then 20 lbs)
So basically im just curious if ill be able to break the 900 rwhp mark on 20+ lbs with the gt55 turbo via 12 bolt in my 408 on 8.5 compression...
hes using a 3 bar map sensor on my setup with the 75# injectors.
he said he wasnt too sure what the setup will produce, but were hoping for at least 825-850 rwhp.
theres gonna be three different setups from what I understand.
1. pump gas (91) minimum of 11.6 lbs ( that is the minimum the wastegate will hold)
2. combonation of race fuel and pump gas(not sure what oct) will run between 15-19 lbs
3. race fuel only- he said hes gonna try to run over 20 lbs(not sure how much more then 20 lbs)
So basically im just curious if ill be able to break the 900 rwhp mark on 20+ lbs with the gt55 turbo via 12 bolt in my 408 on 8.5 compression...
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Originally Posted by KAOS
i say you will be real close to 900, good luck and hope for the best
It will handlle as much power as you want. Name something that would limit it with the current tuning software??????????
I am running a 3 bar with 96 lb injectors. Runs excellent!
I am running a 3 bar with 96 lb injectors. Runs excellent!
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
Stock PCM with the new MAF Translator Pro would let you do some pretty ignorant things power wise for most people. There certainly are limitations with various sensors that you'll have to overcome otherwise. Maybe Harlan can jump in with his two cents.
Originally Posted by DERTY
Stock PCM with the new MAF Translator Pro would let you do some pretty ignorant things power wise for most people. There certainly are limitations with various sensors that you'll have to overcome otherwise. Maybe Harlan can jump in with his two cents.
hmmm, well if harlan ran lets say more then 20 lbs of boost and made that much power on twin 60's on a 346, i should definately be breaking the 1000 rwhp mark assuming it doesnt have any restrictions.
but then again u know what they say about assuming....
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
The white car with the twin 60's is making more than 20lbs and is probably putting out about 1100 FWHP. Harlans car had twin 66's, more than 20lbs and probably put down 1500ish. Sorry about being vague, but those should help you figure out just how good the PCM is. The limitations are really in how you tune it.
Originally Posted by DERTY
The white car with the twin 60's is making more than 20lbs and is probably putting out about 1100 FWHP. Harlans car had twin 66's, more than 20lbs and probably put down 1500ish. Sorry about being vague, but those should help you figure out just how good the PCM is. The limitations are really in how you tune it.
Futral is tuning and putting my car together, so i have no regrets or worries about his expert tuning.
I just wonder why he thinks we will be limited to around 900 rwhp. at least thats what i think he mentioned.
or maybe he could just be telling me that to be extremely conservative, and then surprise me with the real hp numbers when it does get dynoed.
its complicated to even think about
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
You can look at the map, but I believe 900 RW on a conservative streetable tuneup is fairly reasonable at the rear tire. It's pretty much what we would expect the white car to make, except that we've never had it on the dyno to really know or even care for the most part. If you are running the MAF, that's a good reason to really be limited to 900 unless you go speed density with the new box that Harlan's been testing or some other means. He can probably give you a much closer approximation of HP numbers that he was seeing. He has all the data from the runs to be able to figure it out more directly.
I think that the GT55 is going to be a little laggy on the street until you get some good RPM's under it. So, top end it should be a bad bitch. I'm just curious how snappy it's going to be from a lower RPM. It would be really nice to see how well it works for you when he has it all figured out.
I think that the GT55 is going to be a little laggy on the street until you get some good RPM's under it. So, top end it should be a bad bitch. I'm just curious how snappy it's going to be from a lower RPM. It would be really nice to see how well it works for you when he has it all figured out.
Last edited by DERTY; Sep 27, 2005 at 11:05 PM.
just wish we had a good write up on the maft pro already, capabilities, what you need to run it, can you get rid of HPT or does it work in tandem with HPT, EFI or LS1edit, will it come with base maps and will it work with any year from 98 on up with no hitches.
I'm ready to buy the maft pro, but not until we get a good or excellent write up on what it'll do for the average joe out there.
J
I'm ready to buy the maft pro, but not until we get a good or excellent write up on what it'll do for the average joe out there.
J
Last edited by frcefed98; Sep 28, 2005 at 12:13 AM.
The Bull
Joined: Jun 2002
Posts: 3,578
Likes: 2
From: Grand Rapids, MI
I think that's a fair request. I'll run it by Harlan and likely Bob and see what we can come up with. Shouldn't be any different than any other writeup that we've done. Should make it easier for others to make a decision on.
Originally Posted by DERTY
You can look at the map, but I believe 900 RW on a conservative streetable tuneup is fairly reasonable at the rear tire. It's pretty much what we would expect the white car to make, except that we've never had it on the dyno to really know or even care for the most part. If you are running the MAF, that's a good reason to really be limited to 900 unless you go speed density with the new box that Harlan's been testing or some other means. He can probably give you a much closer approximation of HP numbers that he was seeing. He has all the data from the runs to be able to figure it out more directly.
I think that the GT55 is going to be a little laggy on the street until you get some good RPM's under it. So, top end it should be a bad bitch. I'm just curious how snappy it's going to be from a lower RPM. It would be really nice to see how well it works for you when he has it all figured out.
I think that the GT55 is going to be a little laggy on the street until you get some good RPM's under it. So, top end it should be a bad bitch. I'm just curious how snappy it's going to be from a lower RPM. It would be really nice to see how well it works for you when he has it all figured out.
i spoke with him today and hes running the exhuast piping out. gonna try to decide which type of muffler to go with as well.
honestly, if it were a little bit laggy, it wouldnt be all too bad, just because this is the street and i need to have some sort of traction control. im assuming ill still make enough power at lets say 2k rpm to have some traction issues. even with lower compression, based off of what other motors ive seen dyno(pur evyl's 408 dynoed 432rwhp or something) that will be plenty.
obviously thats comparing his peak rwhp to rpm's at 2k rpm, but its also gonna have boost as his didnt.
So what is different between the maf transaltor and maf pro?
Originally Posted by DERTY
I think that's a fair request. I'll run it by Harlan and likely Bob and see what we can come up with. Shouldn't be any different than any other writeup that we've done. Should make it easier for others to make a decision on.
Thanks man, i'll be looking forward to it! I'm ready to buy, but not until I'm sure it'll be easy to use and will get along with my 98 PCM....but from what i've read on the their website it looks to be pretty damn awesome.
J