ET 215s with 233/239 or TRex?
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ET 215s with 233/239 or TRex? Which cam would be better suited for these heads on a 347 and why? It would also be running a victor jr. and accufab TB. Compression ratio is going to be 11.5:1
I've got both cams and am not against trying them both. But if I reach my goal right off the bat with one or the other I probably won't try the other.
I've got both cams and am not against trying them both. But if I reach my goal right off the bat with one or the other I probably won't try the other.
Originally Posted by flyinglow57
if i know correctly.. you can only use the t-rex with Z06 heads or you have to cut the pistons correct?
so looks like you gots to go with the other cam.
so looks like you gots to go with the other cam.
IIRC, his pistons were flycut, but that was for his stock 15* heads. No need to flycut with the 11* ET's.
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Originally Posted by flyinglow57
if i know correctly.. you can only use the t-rex with Z06 heads or you have to cut the pistons correct?
so looks like you gots to go with the other cam.
so looks like you gots to go with the other cam.
There is actually quite a bit more clearance than even an unmilled stock valved head.
But regardless it's mating up to a shortblock with the correct flycuts for 11* ET heads.
Originally Posted by flyinglow57
if i know correctly.. you can only use the t-rex with Z06 heads or you have to cut the pistons correct?
so looks like you gots to go with the other cam.
so looks like you gots to go with the other cam.
Both cam will fit with ET 215, but I would still check PTV.
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
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Originally Posted by SlickVert
Both cam will fit with ET 215, but I would still check PTV.
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
Originally Posted by SlickVert
Both cam will fit with ET 215, but I would still check PTV.
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
The issue is the ET 215 is a awesome heads and flows great numbers
.
The T-Rex cam was decided for max effort with the lower flowing of the stock head, but the valve events on the T-Rex are great and has great lobes (XER).
Ideally, maybe a slightly small duration cam would be better. I am not sure what the valve event are on the 233/239 cam are or what type of lobes.
I would call Geoff @ Thunder Racing he can answer your question best.
If I had two chose between the two, hands down T-Rex
ET 215 and T-Rex will get the job none!
Is it the best combo?
Bob
would someone mind elaborating on how the cam is designed for heads with low flow numbers? and how would anything in that case not work just completely better with higher flowing heads...just a little confused about that.
thanks
Louie
If you're running a single plane intake, you'll want different valve events than either of the cams listed. Fireball has done extensive testing with a 346 using a single plane intake and ported heads. He found the T-Rex to have too late of an IVC to make good power under the curve with that intake. He's got a new cam with a VERY narrow LSA (think less than 107) and his results look very promising. I would check out his progress before you make a cam decision.
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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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Thanks patrick, That is one option but of the two I already have.... I am going to try one. They are both used anyway, so I am not really losing anything by trying them first to see if my goals can be met. ~470whp.
Of the two I have the 233/239 comes up with a DCR of 8.6x and the TRex a 8.4x I am almost inclined to try the 233/239 with the higher DCR. But then again the TRex has been 'proven' on the ET215s at 58cc.... hrmmmm
Of the two I have the 233/239 comes up with a DCR of 8.6x and the TRex a 8.4x I am almost inclined to try the 233/239 with the higher DCR. But then again the TRex has been 'proven' on the ET215s at 58cc.... hrmmmm
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Originally Posted by mr2guru
But then again the TRex has been 'proven' on the ET215s at 58cc.... hrmmmm
plan on revving to the moon if you put the trex in @ 108-110 ICL with the vic.
