91 firebird H/C/I LQ4 vs procharged mach 1
06-30-2014, 01:42 PM
#82
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Lot of misconceptions in this thread.
Just for some info...I gained 16 rwhp with mid lengths and retune. Granted, I already had catted X and Catback as well as CAI.
As for 6psi, that is low. 10 psi is where it should be at. In addition, the 4V MACH motor will handle the power, it's is all about the tune. The thing that really kills most of the the DOHC motor is over revving. It causes an issue with the oil pump. Ford Racing has a better pump if you would like to play it safe.
Just for some info...I gained 16 rwhp with mid lengths and retune. Granted, I already had catted X and Catback as well as CAI.
As for 6psi, that is low. 10 psi is where it should be at. In addition, the 4V MACH motor will handle the power, it's is all about the tune. The thing that really kills most of the the DOHC motor is over revving. It causes an issue with the oil pump. Ford Racing has a better pump if you would like to play it safe.
I also said it'll handle the power, comes down to efficiency and tune. And yes, that's why I said shoot for 8-9psi at 6500rpm so your not spinning the motor to high.
Idk if the misconceptions came from my post, but I've been around 2v/4v for a while, I have a pretty good idea what they do power/trap wise for mods. What's safe what's not.
06-30-2014, 02:53 PM
#83
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So did you go mid lengths with an off road mid pipe? Or catted? If catted, 16rwhp is good. That's not the norm though.
I also said it'll handle the power, comes down to efficiency and tune. And yes, that's why I said shoot for 8-9psi at 6500rpm so your not spinning the motor to high.
Idk if the misconceptions came from my post, but I've been around 2v/4v for a while, I have a pretty good idea what they do power/trap wise for mods. What's safe what's not.
I also said it'll handle the power, comes down to efficiency and tune. And yes, that's why I said shoot for 8-9psi at 6500rpm so your not spinning the motor to high.
Idk if the misconceptions came from my post, but I've been around 2v/4v for a while, I have a pretty good idea what they do power/trap wise for mods. What's safe what's not.
When I chose the Bassani mid-length headers, I also went with their 5-piece mid-pipe with removable cats (replaced by test pipe). You could run the Cats on the street and remove them for the track. I also had a crappy canned Diablow tune. After the headers and mid-pipe were installed, I also purchased an SCT tuner and had Fastlane Motorsports tune the car on the dyno. You are correct though, the 16rwhp gain was without the cats installed. Currently, I run the cats because I can't stand the smell and it is loud as **** with the Magnapacks..LOL (I am getting old)
06-30-2014, 02:58 PM
#84
longtubes were the single biggest gain on my 01' cobra when it was bolt ons. .3 and 3mph. Not sure were your getting your info from. every c headed n/a 4v I have tuned gained 15-20 whp from stock logs with an o/r x to longtubes. and for roll racing the 4.30's suck unless you can rev to 7500. I had 4.30's with bolt on's and went down to 3.73's and the car gained a half car from a roll.
06-30-2014, 03:04 PM
#85
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No, the misconceptions were not from your post. What you stated was accurate.
When I chose the Bassani mid-length headers, I also went with their 5-piece mid-pipe with removable cats (replaced by test pipe). You could run the Cats on the street and remove them for the track. I also had a crappy canned Diablow tune. After the headers and mid-pipe were installed, I also purchased an SCT tuner and had Fastlane Motorsports tune the car on the dyno. You are correct though, the 16rwhp gain was without the cats installed. Currently, I run the cats because I can't stand the smell and it is loud as **** with the Magnapacks..LOL (I am getting old)
When I chose the Bassani mid-length headers, I also went with their 5-piece mid-pipe with removable cats (replaced by test pipe). You could run the Cats on the street and remove them for the track. I also had a crappy canned Diablow tune. After the headers and mid-pipe were installed, I also purchased an SCT tuner and had Fastlane Motorsports tune the car on the dyno. You are correct though, the 16rwhp gain was without the cats installed. Currently, I run the cats because I can't stand the smell and it is loud as **** with the Magnapacks..LOL (I am getting old)
06-30-2014, 03:13 PM
#86
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longtubes were the single biggest gain on my 01' cobra when it was bolt ons. .3 and 3mph. Not sure were your getting your info from. every c headed n/a 4v I have tuned gained 15-20 whp from stock logs with an o/r x to longtubes. and for roll racing the 4.30's suck unless you can rev to 7500. I had 4.30's with bolt on's and went down to 3.73's and the car gained a half car from a roll.
Currently, my redline is set to 7K and I shift at 6800. Wish I could push the rpms further because this cam still wants more. However, I do not want to push it. I should have went with the FR oil pump when I had the front cover off but the tuner did not push it when I asked.
06-30-2014, 06:13 PM
#87
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longtubes were the single biggest gain on my 01' cobra when it was bolt ons. .3 and 3mph. Not sure were your getting your info from. every c headed n/a 4v I have tuned gained 15-20 whp from stock logs with an o/r x to longtubes. and for roll racing the 4.30's suck unless you can rev to 7500. I had 4.30's with bolt on's and went down to 3.73's and the car gained a half car from a roll.
Agreed..With 4.30s you're pretty much done at 120mph unless you can continue to make power in the higher rpm range.
Currently, my redline is set to 7K and I shift at 6800. Wish I could push the rpms further because this cam still wants more. However, I do not want to push it. I should have went with the FR oil pump when I had the front cover off but the tuner did not push it when I asked.
Currently, my redline is set to 7K and I shift at 6800. Wish I could push the rpms further because this cam still wants more. However, I do not want to push it. I should have went with the FR oil pump when I had the front cover off but the tuner did not push it when I asked.
Got a dyno graph? 4.30s with a 26" tire on your limiter is 125. That is more then enough gear for your combo as you would probably benefit from a 4.56 and a 7100-7200 limiter.
06-30-2014, 06:23 PM
#88
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You are not the only one who has picked up that from long tubes alone. On a bolt-on car 4.30 or 4.56s are the way to go on a 26" tire. Did you get track results or just roll results because I bet you would have a different opinion on the matter if It was track results.
Got a dyno graph? 4.30s with a 26" tire on your limiter is 125. That is more then enough gear for your combo as you would probably benefit from a 4.56 and a 7100-7200 limiter.
Got a dyno graph? 4.30s with a 26" tire on your limiter is 125. That is more then enough gear for your combo as you would probably benefit from a 4.56 and a 7100-7200 limiter.
http://www.instavillage.com/v/744284...140_231245670/
http://www.instavillage.com/v/744222...061_231245670/
There are two vids of my 04 blue MACH. When I stop by FLM again, I will ask them for a printout.
06-30-2014, 09:31 PM
#91
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You are not the only one who has picked up that from long tubes alone. On a bolt-on car 4.30 or 4.56s are the way to go on a 26" tire. Did you get track results or just roll results because I bet you would have a different opinion on the matter if It was track results.
Got a dyno graph? 4.30s with a 26" tire on your limiter is 125. That is more then enough gear for your combo as you would probably benefit from a 4.56 and a 7100-7200 limiter.
Got a dyno graph? 4.30s with a 26" tire on your limiter is 125. That is more then enough gear for your combo as you would probably benefit from a 4.56 and a 7100-7200 limiter.
06-30-2014, 09:42 PM
#93
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I doubt his car falls off that hard with the cams. Like a said with stock cams 6600-6800 shifts ftw as it worked for my auto mach. The car made 298 with a few bolt-ons and went 12.6 @ 112 with a crap 60ft.
06-30-2014, 11:20 PM
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07-01-2014, 12:37 PM
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07-01-2014, 06:05 PM
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Good point though..
07-07-2014, 02:17 PM
#98
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I don't think either would have affected the outcome much. Don't forget, the bird started at like 2800 rpm both runs. Mach owner seemed to be shifting pretty fast from what I could hear while in quickshift's car. I do think less gear would help the mach though.
