H/I/C dyno prediction?
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Launching!
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H/I/C dyno prediction? Last dyno was 414rwhp (corrected) with the G5X3, ported FAST92/92, all other normal bolt-ons (lid/exhaust/UD pulley/etc). AFR 205s recently installed, street tuned, feels great but I have no traction until 3rd gear so I really can't tell HOW much faster it really is (older 275 street tires). Going in for a dyno tune Thursday hopefully. What do ya'll guess it will put down on the dyno? Oh, and it's a M6 w/3.42s.
My buddy put down 472whp through a restrictive SLP dual dual catback and 4.10 gear (10 bolt), but that was with TFS heads. I hear those peak alittle higher, however I'm running a higher flowing exhaust and on a 3.42. So I dunno how that will come into play. He has the same lid, same intake and port job, same cam, similar headers/ORY. Ya'll think I'll make 470 or is that too optimistic? I'm not looking at the peak number for bragging rights, I bought these heads with the intent to murder people in the low/mid range. I'm just curious is all.
-Tony
My buddy put down 472whp through a restrictive SLP dual dual catback and 4.10 gear (10 bolt), but that was with TFS heads. I hear those peak alittle higher, however I'm running a higher flowing exhaust and on a 3.42. So I dunno how that will come into play. He has the same lid, same intake and port job, same cam, similar headers/ORY. Ya'll think I'll make 470 or is that too optimistic? I'm not looking at the peak number for bragging rights, I bought these heads with the intent to murder people in the low/mid range. I'm just curious is all.
-Tony
What's the cr if you milled the heads? With my car when I had the 1 3/4 headers, 10bolt and 4.10s I made 455/415 I have learned numbers are nothing because I was big on numbers but the track don't lie 1.65 60' 11.3 @ 124 I didn't add or dyno the car as it sits now with what is in my sig
Thread Starter
Launching!
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What's the cr if you milled the heads? With my car when I had the 1 3/4 headers, 10bolt and 4.10s I made 455/415 I have learned numbers are nothing because I was big on numbers but the track don't lie 1.65 60' 11.3 @ 124 I didn't add or dyno the car as it sits now with what is in my sig
Question...FAST intake ported?? Or stock FAST? And that 4.10 gear is worth roughly 8whp on a dyno. I know that helps in the 1/4, just sayin for the number it hurts.
I ported the fast out myself port matched to heads and sanded the runners smooth I'm going to be getting tuned again its kind of on the rich side I've always seen the vettes to run better numbers than the f bodys true dual exhaust and idk if there drive train loss is different
Also you have to think where you are if I go to new jersey to race my buddy goes about .5 faster and picks up a few mph in the quater..
But another thing is you make 414 with stock gear, all bolt ons except a ewp and a ported fast just adding stock cr afr heads is not going to gain you 50-60 rwhp if I were you id bump cr up to 11.5 to gain some more also. With with the cr up I think 460. With it stock cr 450 id say
Also you have to think where you are if I go to new jersey to race my buddy goes about .5 faster and picks up a few mph in the quater..
But another thing is you make 414 with stock gear, all bolt ons except a ewp and a ported fast just adding stock cr afr heads is not going to gain you 50-60 rwhp if I were you id bump cr up to 11.5 to gain some more also. With with the cr up I think 460. With it stock cr 450 id say
Last edited by quik01ss; May 3, 2010 at 10:36 PM.
Thread Starter
Launching!
Joined: Apr 2008
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I ported the fast out myself port matched to heads and sanded the runners smooth I'm going to be getting tuned again its kind of on the rich side I've always seen the vettes to run better numbers than the f bodys true dual exhaust and idk if there drive train loss is different
Also you have to think where you are if I go to new jersey to race my buddy goes about .5 faster and picks up a few mph in the quater..
But another thing is you make 414 with stock gear, all bolt ons except a ewp and a ported fast just adding stock cr afr heads is not going to gain you 50-60 rwhp if I were you id bump cr up to 11.5 to gain some more also. With with the cr up I think 460. With it stock cr 450 id say
Also you have to think where you are if I go to new jersey to race my buddy goes about .5 faster and picks up a few mph in the quater..
But another thing is you make 414 with stock gear, all bolt ons except a ewp and a ported fast just adding stock cr afr heads is not going to gain you 50-60 rwhp if I were you id bump cr up to 11.5 to gain some more also. With with the cr up I think 460. With it stock cr 450 id say
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If you haven't milled those AFRs, you're leaving good power on the table. I'll say 455.
Btw, the SLP dual/dual is one of the most free-flowing catbacks for LS1's. It isn't considered restrictive.
Btw, the SLP dual/dual is one of the most free-flowing catbacks for LS1's. It isn't considered restrictive.
Thread Starter
Launching!
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So how does the dual/dual compare to say...a magnaflow catback? That's what i want. Regardlessway, the dual/dual can't outflow my current exhaust so we'll just see how it goes.
Thread Starter
Launching!
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You don't have to flycut the pistons I have the 112lsa cam with 59.5 cc and .040 cometic gasket even 59cc lg said it will be ok but they don't recomend it. If I were you id wait to do the afrs until you mill and get gaskets if you wanted them
Thread Starter
Launching!
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I'll try to get a video and post a dyno sheet. Hell yeah. I'm ready to hear that thing in action. Those G5x? series cams have always sounded/performed really well.
Thread Starter
Launching!
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You guys were about dead on. Uncorrected 460.19/425.74. Corrected (98%) 454/420. Gained about 50rwhp and 35rwtorque. My buddy got some videos on his Droid since my digital camera broke. As soon as I get those from him I'll post them.
Last edited by squale iii; May 6, 2010 at 06:03 PM.
Thread Starter
Launching!
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Ya. The torque is unbelievable. I'm ordering DR's in a week or so b/c I literally have no traction if I powershift until 3rd. I kinda wish I had the heads milled when I bought them, but these will do for now I'll have the heads worked on when I get the C5Z to transfer them onto. I don't know anything about SAE or whatever you were saying. I know it was corrected b/c of the temperature/humidity or whatever so it read lower. He said it if was dyno'd later in the day it would have read higher.
I'll have the heads worked on when I get the C5Z to transfer them onto. I don't know anything about SAE or whatever you were saying. I know it was corrected b/c of the temperature/humidity or whatever so it read lower. He said it if was dyno'd later in the day it would have read higher.