Very dissapointed
a good way to compare is find a club that has a dyno day. then you'll see how you stack up. i have had dyno numbers well below what i thought my mods should run, but my car runs and drives great. so i should be happy.
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From: Tuscaloosa, AL.
Wow, I would expect better #s than that as well. I love it when people say, "Don't worry about dyno #s". For the most part, this is fair because of variables. I mean there is not a reason to complain about 10-15 or evn 20 hp. But when your car is not even in the ballpark of what it oughta be putting down, as a customer I will be concerned (and rightfully so). I completely understand what you are saying.
For instance, we have a similar setup (except I have AFRs, a smaller cam, and the fast 90/90) and If my car had put down say 360, I would have been pissed. I know that 435 is a little lower than expected, but since it was in the ballpark I wasn't bothered by few hp, but again it WAS in the ballpark, and yours is not.
I would suggest that you take it to another tuner, with a different dyno and have them tune it. This will give you a better idea of if it's the parts (highly doubtful), the tune, or the dyno.
FWIW, patriot heads are not going to cause anyone to LOOSE hp. That is rediculous. Are they as good as aftermarket castings? No, AFR, TFS, & ETP aftermarket castings are superior to ported gm castings. This does not mean they aren't effective. The folks at patriot know what they are doing, and are not selling a junk product like suggested by bluebeast. They are a budget head no doubt, but that does not mean they are junk.
For instance, we have a similar setup (except I have AFRs, a smaller cam, and the fast 90/90) and If my car had put down say 360, I would have been pissed. I know that 435 is a little lower than expected, but since it was in the ballpark I wasn't bothered by few hp, but again it WAS in the ballpark, and yours is not.
I would suggest that you take it to another tuner, with a different dyno and have them tune it. This will give you a better idea of if it's the parts (highly doubtful), the tune, or the dyno.
FWIW, patriot heads are not going to cause anyone to LOOSE hp. That is rediculous. Are they as good as aftermarket castings? No, AFR, TFS, & ETP aftermarket castings are superior to ported gm castings. This does not mean they aren't effective. The folks at patriot know what they are doing, and are not selling a junk product like suggested by bluebeast. They are a budget head no doubt, but that does not mean they are junk.
OP, definitely get it on a dynojet and get that converter locked. You should definitely see some more appropriate numbers for the setup. That said, get rid of those Patriots if you can. I've got them and they just plain suck. They're the first thing to go when I get the money to redo the combo.
I'm just shocked. I was going for lowest h/c LS1 in the world with my 400/367 (you win on the torque side, though). Was yours an A4?
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From: Southern Oklahoma
Wow, I would expect better #s than that as well. I love it when people say, "Don't worry about dyno #s". For the most part, this is fair because of variables. I mean there is not a reason to complain about 10-15 or evn 20 hp. But when your car is not even in the ballpark of what it oughta be putting down, as a customer I will be concerned (and rightfully so). I completely understand what you are saying.
For instance, we have a similar setup (except I have AFRs, a smaller cam, and the fast 90/90) and If my car had put down say 360, I would have been pissed. I know that 435 is a little lower than expected, but since it was in the ballpark I wasn't bothered by few hp, but again it WAS in the ballpark, and yours is not.
I would suggest that you take it to another tuner, with a different dyno and have them tune it. This will give you a better idea of if it's the parts (highly doubtful), the tune, or the dyno.
FWIW, patriot heads are not going to cause anyone to LOOSE hp. That is rediculous. Are they as good as aftermarket castings? No, AFR, TFS, & ETP aftermarket castings are superior to ported gm castings. This does not mean they aren't effective. The folks at patriot know what they are doing, and are not selling a junk product like suggested by bluebeast. They are a budget head no doubt, but that does not mean they are junk.
For instance, we have a similar setup (except I have AFRs, a smaller cam, and the fast 90/90) and If my car had put down say 360, I would have been pissed. I know that 435 is a little lower than expected, but since it was in the ballpark I wasn't bothered by few hp, but again it WAS in the ballpark, and yours is not.
I would suggest that you take it to another tuner, with a different dyno and have them tune it. This will give you a better idea of if it's the parts (highly doubtful), the tune, or the dyno.
FWIW, patriot heads are not going to cause anyone to LOOSE hp. That is rediculous. Are they as good as aftermarket castings? No, AFR, TFS, & ETP aftermarket castings are superior to ported gm castings. This does not mean they aren't effective. The folks at patriot know what they are doing, and are not selling a junk product like suggested by bluebeast. They are a budget head no doubt, but that does not mean they are junk.
Finally, someone that gets me!
Well, i cant very well go to another tuner, without getting it on a dynojet first to see if im where I think I am. This dyno I used that got me lower numbers reads REAL low. Like a 500rwhp cobra dyno'd 430rwhp on this particular style. So we'll see if its the dyno, but if it isnt, someone is giving my 400$ back or tuning it like it should be tuned.
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From: Southern Oklahoma
well there are a lot of variables the only thing that keeps me sane is this.
My unlocked coverter is losing 20rwhp, and this dyno is low by about 45-75rwhp. I cant base my numbers on this, but it gives me a bit of hope with a new dyno.
Bet your car cant run a 12.2@110 like mine did with 300rwhp 290rwtq
My unlocked coverter is losing 20rwhp, and this dyno is low by about 45-75rwhp. I cant base my numbers on this, but it gives me a bit of hope with a new dyno.
Bet your car cant run a 12.2@110 like mine did with 300rwhp 290rwtq
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If it makes you feel better, I only put down 360whp unlocked on a Mustang dyno with my setup. 
But this thread makes me feel better. Check out the numbers people are putting down, and see what they run at the track. Especially the A4's. https://ls1tech.com/forums/drag-racing-tech/839667-guys-360-380hp-what-s-your-track-times.html
But this thread makes me feel better. Check out the numbers people are putting down, and see what they run at the track. Especially the A4's. https://ls1tech.com/forums/drag-racing-tech/839667-guys-360-380hp-what-s-your-track-times.html
u'd be suprised what a freer flowin exh can p/u.....im runnin a T2 cam with edelbrock stepped headers to a TSP dual kit with magnaflows...i picked up 20hp and 18 ft lbs from the pacesetter/ory/borlamouth set up i previously had...that and my tuner is a perfectionisnt 
Thread Starter
11 Second Club
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From: Southern Oklahoma
take it to a more common unit like a dynojet and retry it. just like a flowbench that takes measurements off of an industry standard and can be manipulated, a dyno is still just a tuning tool and readings will vastly differ all depending on what system it uses and what the variables are set at......
good luck!
good luck!
Last edited by nine-eight; Mar 29, 2008 at 01:26 AM.
every dyno/operator/car/weather is different and that changes numbers...even one mustang dyno can put down high numbers;its all left to the operator from what I read.Plus the torque is always higher on a dynojet,usually. Try a search on dynos,youll understand real fast that dyno is tool to tune, not the absolute truth out there.
The real way to mesure your hp;line up to another car rated from the factory
The real way to mesure your hp;line up to another car rated from the factory