ET 240's or 225's for TSP 408
04-04-2006, 10:37 AM
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ET 240's or 225's for TSP 408 getting ready to put my order in for a TSP 408 but cant decide on heads.. this is gonna be a street/strip car mostly strip prolly take it out on the weekends or to a few car cruises every year. its gonna be a 6speed car with a big nasty cam 4.11 - 4.56 gears. looking to make as close to 550 wheel horse as possible. plus a 200 shot for fun. 
im also considering afr 225's. oh BTW when it comes to the ET heads im in no rush the motor will prolly sit im my living room for 6 months while i get everything else i need like a built tranny, 9", FAST intake etc.
im also considering afr 225's. oh BTW when it comes to the ET heads im in no rush the motor will prolly sit im my living room for 6 months while i get everything else i need like a built tranny, 9", FAST intake etc. Last edited by madmaxz; 04-04-2006 at 10:47 AM.
04-04-2006, 11:13 AM
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yeah i read that somewhere also, i was thinking about going sheetmetal but i dont wanna get bumped out some of the "stock" classes or race day. 
04-04-2006, 11:16 AM
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I will tell you this. My hogged out LSX90mm can`t keep up with my 245`s from ET. I`m trying to figure out which direction to go from here also. What other intakes are out there for street use?
04-04-2006, 11:29 AM
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this is the first time ive seen this i was just searching for sheetmetal intakes check it out. http://www.wilsonmanifolds.com/shop/en-us/front.html click on the catalog .pdf and goto page 8! i wonder how much it costs.
04-04-2006, 12:42 PM
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no havent really lookied into the darts yet and all i see is the stage 2 darts on the texas speed site. but even the stage 2s seem to flow as well as the afr's for $750 cheaper
ok i found the stage 3's not bad looking for $1900! id really like to see some dyno # and track times!
ok i found the stage 3's not bad looking for $1900! id really like to see some dyno # and track times!
Last edited by madmaxz; 04-04-2006 at 12:54 PM.
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04-04-2006, 01:34 PM
#8
Originally Posted by beardWS6
I will tell you this. My hogged out LSX90mm can`t keep up with my 245`s from ET. I`m trying to figure out which direction to go from here also. What other intakes are out there for street use?
Even with NASCAR restrictor plates, teams always put the best cylinder head they can underneath. The better they flow, the better they work with the upstream restriction. I'm just curious why this wouldn't be the case with the FAST intake as well? The better the heads, the stronger the draw through the FAST 90/90.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
04-04-2006, 01:52 PM
#9
Originally Posted by Patrick G
Why is the FAST intake such a detriment to your ET heads making big power and it's not for AFR 225s? There are a ton of 408s with AFR 225s and FAST 90/90s making 525-550 rwhp. Sure it holds the heads back, but they're still making the power.
Even with NASCAR restrictor plates, teams always put the best cylinder head they can underneath. The better they flow, the better they work with the upstream restriction. I'm just curious why this wouldn't be the case with the FAST intake as well? The better the heads, the stronger the draw through the FAST 90/90.
Even with NASCAR restrictor plates, teams always put the best cylinder head they can underneath. The better they flow, the better they work with the upstream restriction. I'm just curious why this wouldn't be the case with the FAST intake as well? The better the heads, the stronger the draw through the FAST 90/90.
This is a very similar post to what I was thinking. I agree 100%.
Thats why I said the 240 (acturally are 245's) for your setup.
Ill make another suggestion.
Buy a set of ET LS7 style heads on a 4" bore. Then buy the LS7 rockers arms/bolts, and LS7 intake manifold. Now you have a better flowing intake and some badass heads.
I will also add that the AFR combo's listed above have made killer power on a 408 through a Fast 90. But the fast still is the boddleneck.
You might only see a 10-15 HP difference if you had a intake that was 25% better but 10-15HP is 10-15 HP.
04-04-2006, 02:04 PM
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i really like that idea but now were talking almost $1300 more at least.. the LS7 heads are $3200, ls7 intake $300? rockers.... i think ill stick with the LSX for now.. i can make my 550rwhp with the LSX, ive seen it done with AFR's, havent seen it with ETP's yet . gmpartsdirect has the LS7 intake for $262
Last edited by madmaxz; 04-04-2006 at 02:09 PM.
04-04-2006, 02:06 PM
#11
ET 245 heads plus a fast 90mm intake is almost the exact same amount as ETP LS7 heads plus a LS7 intake.
The only difference is the LS7 rocker setup. All the gasket prices will pretty much cancel eachother out.
But your right. There is plenty of power out of the Fast 90/90 and a set of AFR or ETP heads.
The only difference is the LS7 rocker setup. All the gasket prices will pretty much cancel eachother out.
But your right. There is plenty of power out of the Fast 90/90 and a set of AFR or ETP heads.
04-04-2006, 02:14 PM
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yeah you right it ends up being about the same
ETP 245's - $2600
Fast intake w tb - $1100
$3700
ETP LS7 heads (250cc) $3200
Ls7 intake $270 +90mm TB $223
Rockers - $?
damn sounds like the way to go BUT
https://ls1tech.com/forums/showthrea...ight=ls7+heads
ETP 245's - $2600
Fast intake w tb - $1100
$3700
ETP LS7 heads (250cc) $3200
Ls7 intake $270 +90mm TB $223
Rockers - $?
damn sounds like the way to go BUT
https://ls1tech.com/forums/showthrea...ight=ls7+heads
Last edited by madmaxz; 04-04-2006 at 03:02 PM.
04-04-2006, 02:25 PM
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I`m not upset with the power I got with my set-up. But I do know the intake is my bottleneck. The heads outflow the 90mmLSX Pretty good. We can see it on the dyno sheet. I`ve talk to others and they have told me the same. I could only run 22 degrees timing. You can see this thing makes monstor TRQ all the time. Love the seat of pants feel. This car pulls like a mother ALL the way threw! I haven`t sprayed on the street yet. She gets no traction down low, and you can feel her spin at 40 rolls pretty good with the 315 nitto`s. So spraying on my nitto`s isn`t going to be easy!!
