Dyno'd today and WTF!!
Good luck. From the looks of things you've got at least 30rwhp hidden in there with a few various finishing touches. Maybe more.
One last hint of advice. Sell the 85mm maf and put a stock one back on the car. It's not helping you at all with an LS6 intake, stock sized lid and stock sized TB. You still have a bottle neck before AND after the MAF, which pretty much renders it useless. Stock Fbody MAF's are good to 480rwhp or so before they need to be changed out IMO.
One last hint of advice. Sell the 85mm maf and put a stock one back on the car. It's not helping you at all with an LS6 intake, stock sized lid and stock sized TB. You still have a bottle neck before AND after the MAF, which pretty much renders it useless. Stock Fbody MAF's are good to 480rwhp or so before they need to be changed out IMO.
is it harming me at all though? I have plans for a fast set up at some point in the near future so if its not necessarily hurting me now and it will give me gains in the future i might as well leave it!
Probably over kill, but you need to do a compression check. Driving 20 miles on larger volume injectors can easily wash your rings out.
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
On The Tree
Joined: Jun 2007
Posts: 184
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hey man if it makes u feel any better i put my car on my friends dyno just to see where it was at well it said 320... when it was tuned at speed inc it said 379... lol so in other words never listen to the numbers its there to tune .. all that matters is what it does at the track
Probably over kill, but you need to do a compression check. Driving 20 miles on larger volume injectors can easily wash your rings out.
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
Probably over kill, but you need to do a compression check. Driving 20 miles on larger volume injectors can easily wash your rings out.
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
You need that a/f up to about 13.2, get some good gas and plugs in the car and bypass that horrible excuse for a free-flowing muffler and you should be set. You aren't making 440RWHP with a 228R cam though.
M6 or A4?
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My thoughts:
-11.5 is very rich, but it's not going to pick you up 60rwhp so don't get your hopes up. (That comment is geared towards your hopes of 440rwhp)
-Driving on larger injectors for ONE mile is a no-no, much less 20+ miles. You can easily wash the cylinders out doing that. More than likely your plugs are garbage at the very least.
-Your 85mm MAF might look cute in your engine bay, but if your "tuner" hasn't scaled the MAF properly (and it appears he didn't) your fueling will be all over the place and it's doing you more harm than good. Hence the reason he's trying to command 12.8 A/F in the PCM, and it's giving you 11.5.
-Flowmaster mufflers on F-bodies flow as about as well as Obama's political views. You're easily giving up 10-15rwhp in this department alone.
Put a $35 cutout on the car to bypass the shitty muffler, change your plugs, have your tuner (if he knows how) scale your MAF properly ON THE STREET, and then tune the car ON THE STREET. Then, strap it down and make adjustments for your internet dyno #. Good luck.
-11.5 is very rich, but it's not going to pick you up 60rwhp so don't get your hopes up. (That comment is geared towards your hopes of 440rwhp)
-Driving on larger injectors for ONE mile is a no-no, much less 20+ miles. You can easily wash the cylinders out doing that. More than likely your plugs are garbage at the very least.
-Your 85mm MAF might look cute in your engine bay, but if your "tuner" hasn't scaled the MAF properly (and it appears he didn't) your fueling will be all over the place and it's doing you more harm than good. Hence the reason he's trying to command 12.8 A/F in the PCM, and it's giving you 11.5.
-Flowmaster mufflers on F-bodies flow as about as well as Obama's political views. You're easily giving up 10-15rwhp in this department alone.
Put a $35 cutout on the car to bypass the shitty muffler, change your plugs, have your tuner (if he knows how) scale your MAF properly ON THE STREET, and then tune the car ON THE STREET. Then, strap it down and make adjustments for your internet dyno #. Good luck.
Cam only 228r M6
https://ls1tech.com/forums/dynamomet...o-results.html
A vette on a DD dyno...
https://ls1tech.com/forums/dynamomet...e-doctors.html
https://ls1tech.com/forums/dynamomet...o-results.html
mid 400 seems to be the average with TSP 5.3's. I couldn't find many LS6+228 combos but I know they're out there. A few TEA and TFS/AFR combos were consistently higher. Just trying to help!
https://ls1tech.com/forums/dynamomet...o-results.html
A vette on a DD dyno...
https://ls1tech.com/forums/dynamomet...e-doctors.html
https://ls1tech.com/forums/dynamomet...o-results.html
mid 400 seems to be the average with TSP 5.3's. I couldn't find many LS6+228 combos but I know they're out there. A few TEA and TFS/AFR combos were consistently higher. Just trying to help!
A dirty MAF will NOT make a car run rich, it will make it run lean, every time. The dirt insulates the hot wires and fools the computer into believing the engine is ingesting less air, not more.
A tune that still has the long term fuel trims enabled, will richen up over time, if the tune is not dialed in correctly. This is the most likely cause of your now rich condition.
FWIW, there's nothing wrong with the 98 computers. I have no problem tuning them. There's a little less resolution in the tables, and of course they have a backup VE, but I've never had one run bad just because it was a 98 PCM.
A tune that still has the long term fuel trims enabled, will richen up over time, if the tune is not dialed in correctly. This is the most likely cause of your now rich condition.
FWIW, there's nothing wrong with the 98 computers. I have no problem tuning them. There's a little less resolution in the tables, and of course they have a backup VE, but I've never had one run bad just because it was a 98 PCM.
I agree with everything in this thread but the flowmaster muffler. There was a thread in this section of a guy making 430whp or so thru the flowmaster muffler. He opened up the cutout on the same dyno and it picked up 5-6whp... it was a heads cam setup similar to yours, so that is definately not were all your missing power is to be had.
Last edited by kinglt-1; Apr 9, 2010 at 12:11 PM.
And when I move to Florida, this is why I will take my LS1 to Virgina Speed for tuning and upgrading, since I have heard nothing but amazing things!! LOL Given Texas Speed is only 2 hours away so I may start there but I wont live in texas much longer 
Lol. That A/F ratio is pretty far from the ideal 13ish you want to be at WOT. Also, knock can drastically reduce hp since it's pulling timing. Get those issues resolved (it'll need to be retuned if you haven't done so since adding H/C) and you should pick up noticable hp.
-Your 85mm MAF might look cute in your engine bay, but if your "tuner" hasn't scaled the MAF properly (and it appears he didn't) your fueling will be all over the place and it's doing you more harm than good. Hence the reason he's trying to command 12.8 A/F in the PCM, and it's giving you 11.5.
...and that.Yup, take it to the track while the tune is off, running rich, and has possible knock... great idea.
FWIW, there's nothing wrong with the 98 computers. I have no problem tuning them. There's a little less resolution in the tables, and of course they have a backup VE, but I've never had one run bad just because it was a 98 PCM.
There's nothing wrong with 98 cars. I think that's just a common crutch a lot of people use when a car doesn't make the power it should. I've had no problems making power with 98's. Their PCM's arent as "tuner friendly" as all the newer models/OS's, but they still work just fine.
11 Second Club
Joined: Aug 2008
Posts: 252
Likes: 0
If you're keeping up with Vettes, then you're making power despite the dyno. I'd imagine the weight diff btw u and vette is at least 400 lbs.
I have the same heads as u with a 224/230 cam...i put down 391 through a vig stall unlocked. I don't have any 1320 times but does 0-60 like a raped ape. About 3.8 on street tires according to the g-tech.
There are a LOT of happy dyno's out there.
I have the same heads as u with a 224/230 cam...i put down 391 through a vig stall unlocked. I don't have any 1320 times but does 0-60 like a raped ape. About 3.8 on street tires according to the g-tech.
There are a LOT of happy dyno's out there.