Disapointed in Dyno #s 408
07-16-2009, 09:38 PM
#42
I think you'll like the TSP 1 7/8" long tubes! 
Let us know if we can help in any way getting your new combo together. I think you'll be very happy with your cylinder head change.
Let us know if we can help in any way getting your new combo together. I think you'll be very happy with your cylinder head change.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
07-17-2009, 11:39 AM
#46
Heads are junk, cam is questionable, the intake I would leave the 92mm alone porting these things isn't something I would count on improving the intake becuase I ahve seen more get screwed up then make better power.
Headers, they're not the best option but aren't killing it. I'd put somethign on with a 1 7/8 primary for sure, what's after the headers too? That could be as much the problem as the headers.
The 60 lb injectors aren't really needed either, green top ford ones would have been enough.
I'd take those heads off first and find a friend that needs a new anchor for his boat and give them to him. That would be the first step to getting to 500. As for a replacment, any 225 to 235 cc head from perf. inductions (used to be ET) trickflow, afr, allpro, not in any specific order would be your best bet. Initially I'd leave that cam in there, but if swapping the heads, then the exhaust doesn't fix it ditch that cam and get something custom done, high 240's for duration, keep the lift around 600 to 610 any more then that usually has very minimal return and is alot more wear on the valvetrain.
Headers, they're not the best option but aren't killing it. I'd put somethign on with a 1 7/8 primary for sure, what's after the headers too? That could be as much the problem as the headers.
The 60 lb injectors aren't really needed either, green top ford ones would have been enough.
I'd take those heads off first and find a friend that needs a new anchor for his boat and give them to him. That would be the first step to getting to 500. As for a replacment, any 225 to 235 cc head from perf. inductions (used to be ET) trickflow, afr, allpro, not in any specific order would be your best bet. Initially I'd leave that cam in there, but if swapping the heads, then the exhaust doesn't fix it ditch that cam and get something custom done, high 240's for duration, keep the lift around 600 to 610 any more then that usually has very minimal return and is alot more wear on the valvetrain.
07-17-2009, 03:16 PM
#48
LOL about the boat anchor...I do live in FL.
Don't think you read my updates, but I sold the top. Bought 1 7/8 headers and going LS3 combo, so far I've got the OE new LS3 int, rockers, TB bracket.
Can't beat the TSP LS3 heads for the price/flow. Considering a cam swap but may just leave it alone.
The cat back is a Borla type of design. Over the axle 3 inch split out the back the other side goes into my SLP 2OTL, I also have a resonator in the I pipe to eliminate rasp. Sounds great! With the new Y I'll install a electric cutout on the I. I feel I should get what I want with this setup now. I've seen similar cam grinds hit 500whp with these heads. Thing is I'll need to bump the cc from 67 to 66 to hit the 11.0 I want with the .030 cometic gasket.
Don't think you read my updates, but I sold the top. Bought 1 7/8 headers and going LS3 combo, so far I've got the OE new LS3 int, rockers, TB bracket.
Can't beat the TSP LS3 heads for the price/flow. Considering a cam swap but may just leave it alone.
The cat back is a Borla type of design. Over the axle 3 inch split out the back the other side goes into my SLP 2OTL, I also have a resonator in the I pipe to eliminate rasp. Sounds great! With the new Y I'll install a electric cutout on the I. I feel I should get what I want with this setup now. I've seen similar cam grinds hit 500whp with these heads. Thing is I'll need to bump the cc from 67 to 66 to hit the 11.0 I want with the .030 cometic gasket.
07-17-2009, 08:56 PM
#53
ryansws6 feel free to PM me if you'd like, I probably can steer you to something that will be a more guarintee'd setup if you haven't purchased anything yet.
Sorry, I didn't read every post in the thread, I just ready the first couple posts, realized what you had on the car and knew the problem.
Patriot sells a decent valvespring, I'll give them that. But when it comes to heads, they should probably stop.
Sorry, I didn't read every post in the thread, I just ready the first couple posts, realized what you had on the car and knew the problem.
Patriot sells a decent valvespring, I'll give them that. But when it comes to heads, they should probably stop.
07-19-2009, 03:04 AM
#55
Its HP and TQ that gets you down the track. His 455 RWHP will get beat every time by the same set-up car with 490 RWHP, so dyno numbers are "everything".
The track doesn't tell you how the engine combo you built is performing. It just gives you a time through the 1320. If 10 others built the same set-up that all make around 500 RWHP and there's some issue with yours and it only makes 455, the dyno will tell you if its low on power/torque so you can figure it out before you go romping on it at the track and maybe damage something.
.
Last edited by LS6427; 07-19-2009 at 03:15 AM.
07-19-2009, 03:11 AM
#56
Mods in sig, finally got a dyno tune today, 455/455. I'm disapointed. Trust me the car is super fun to drive and a hand full, but from what I've seen here I expected at least 470. I was hoping for 490+.
Here's the story, couple things hurting HP:
My 342 rear was bad so I dropped in my 323. I've already ordered 373s.
My CNC Patriot2 heads?
Cam?
Unported 92 Fast
Hooker LTs 1 3/4s I think, non super comp. Thinking of TSP 1 7/8 LTs
I reached peak HP at 5800, a little flat to 6300. I'm ok with that don't want to rev to the moon, though I think it should still pull to 6300. Springs are the double HD good to .650.
Next week I'll have the new gears in.
I've considered ported L92s or Ls7s or more porting on the 243 Ls6 heads.
Fuel is good and timing was 33 max at WOT. AF was 12.5-12.7
Think it may be a combination of needing a custom cam, porting fast 92 and hooker LTs. This all may add up to 50 HP I'm missing...
My goal is 500 NA. So Those ported L92s and LSX int with 1 7/8 LTs should put me into the 500na range.
Here's the story, couple things hurting HP:
My 342 rear was bad so I dropped in my 323. I've already ordered 373s.
My CNC Patriot2 heads?
Cam?
Unported 92 Fast
Hooker LTs 1 3/4s I think, non super comp. Thinking of TSP 1 7/8 LTs
I reached peak HP at 5800, a little flat to 6300. I'm ok with that don't want to rev to the moon, though I think it should still pull to 6300. Springs are the double HD good to .650.
Next week I'll have the new gears in.
I've considered ported L92s or Ls7s or more porting on the 243 Ls6 heads.
Fuel is good and timing was 33 max at WOT. AF was 12.5-12.7
Think it may be a combination of needing a custom cam, porting fast 92 and hooker LTs. This all may add up to 50 HP I'm missing...
My goal is 500 NA. So Those ported L92s and LSX int with 1 7/8 LTs should put me into the 500na range.
How much power do you expect to make with those heads. I read off the Jegs site that those heads flow 304cfm @ .600. Thats horrible. 1998 ported LS1 heads flow that after a little porting, I have them.
You get ported L92's that flow in the 360's and you'll make more than 500 RWHP with a descent 230 sized cam.
Your heads on a 454ci wouldn't make 470 RWHP.
.
07-19-2009, 03:51 AM
#57
Hell look at my sig for my #'s. They where made on a dynojet, heads and cam are PRC 2.5 5.3's and a MS3 (114LSA) through a S60 with 4.10s. Decent power can be made but... My FAST92 is ported and have ARH 1/7" LTs though to make it happen. I will just say that my torque curve looked almost stock other than being significantly higher of course lol. Good power is possible on a budget but has to have the manditory boltons to make it happen like getting air in/out really damn well. The only thing holding me back now is the bottlenecking PRC heads which is the same thing happenning to you. Get those heads on there fella
Mike
Mike
07-19-2009, 02:01 PM
#60
Should be placing an order for the CNC LS3 heads on Monday. Should flow in the 345-355 range, also going to have them milled to 66cc. Want CR to 11.0.
Looks like the cam is staying in for now.
Looks like it'll be running in about 2 weeks or so.
Looks like the cam is staying in for now.
Looks like it'll be running in about 2 weeks or so.