Will 11 degree heads work with 15 degree pistons???
05-29-2005, 09:23 PM
#1
Will 11 degree heads work with 15 degree pistons??? I have a 382 shortblock (all stroke, stock bore with Lunati LS11 pistons)...
I am thinking of getting some custom heads made, 11 degree valve angle, custom blanks all done in house at ET Heads. Will the degree of the heads present any problems with my current 15 degree pistons? Never messed with different angled heads and pistons before...
SDB
I am thinking of getting some custom heads made, 11 degree valve angle, custom blanks all done in house at ET Heads. Will the degree of the heads present any problems with my current 15 degree pistons? Never messed with different angled heads and pistons before...
SDB
05-30-2005, 06:58 AM
#2
FormerVendor
Like always you need to check your P to V and if you need more you can have them cut more. The valves should be close though and still have radial P to V since the angle is lesser rather than greater.
05-30-2005, 11:28 AM
#3
I was thinking alog the same lines, since the head was less degree than the pistons. Since these are blanks and can be custom made, I shouldn't have any problems once the piston specs, block specs are given to the head manufacturer. just hope everything still fits fine (headers, accessories, etc)...
Thanks for the reply.
Thanks for the reply.
05-31-2005, 03:35 AM
#4
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etp heads
Originally Posted by SDB
I was thinking alog the same lines, since the head was less degree than the pistons. Since these are blanks and can be custom made, I shouldn't have any problems once the piston specs, block specs are given to the head manufacturer. just hope everything still fits fine (headers, accessories, etc)...
Thanks for the reply.
Thanks for the reply.
Yes your stock exhaust, accessories and valve covers will still fit, other than the .300 raised valve cover rail, all the exteriors are oem.
Thanks,
Cary Chouinard
ET Performance
Last edited by Cary@Perf-Induction; 05-31-2005 at 03:37 AM. Reason: typo
05-31-2005, 10:13 AM
#5
good to hear...any news on price for the bare heads and assembled ones (I know that Hiflow Heads are a dealer, and they were eaiting on prices from you to qoute me an assembled price). I am leaning toward these over the AFR 225's....if the price is not too bad. Are there any other street cars running these heads? I am getting precise measurement on how far out of the deck the piston is this week, and have the other block and piston specs, so I can email those to you to figure out P-V clearance as well as my cam specs.
SDB
SDB
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05-31-2005, 11:09 PM
#8
FormerVendor
We are also a dealer for ETP heads. On the newer head the intake is the same from what I know and the valve reliefs are just a different angle. I will know more tomorrow and post some more. Everything we have used from ETP has been very nice so far.
06-01-2005, 10:16 AM
#11
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The goal is to change the angle of the valve inside the head, in order to allow a better port design. Lower angles usually allow better port design. A key reason the ls1 head (15*) is so much better than a SBC head of old (23*).
The angle from head/piston is just the way they measure it, and is after the fact.
The angle from head/piston is just the way they measure it, and is after the fact.
06-01-2005, 10:53 AM
#12
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Originally Posted by SDB
I plan on using teh FAST 90mm intake and NW TB...
SDB
SDB
Have you heard different in dealing with them? That would make thier heads even more attractive without the cost of a new intake. I just dont see how it would work.
06-01-2005, 04:16 PM
#13
Originally Posted by XIII
I was under the impression from Cary's earlier posts on the subject that they were offering a custom intake to fit the 11 and 12 degree heads because current intakes wouldn't fit just like they don't fit on true C5Rs.
Have you heard different in dealing with them? That would make thier heads even more attractive without the cost of a new intake. I just dont see how it would work.
Have you heard different in dealing with them? That would make thier heads even more attractive without the cost of a new intake. I just dont see how it would work.
SDB
06-02-2005, 07:40 PM
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Originally Posted by XIII
I was under the impression from Cary's earlier posts on the subject that they were offering a custom intake to fit the 11 and 12 degree heads because current intakes wouldn't fit just like they don't fit on true C5Rs.
Have you heard different in dealing with them? That would make thier heads even more attractive without the cost of a new intake. I just dont see how it would work.
Have you heard different in dealing with them? That would make thier heads even more attractive without the cost of a new intake. I just dont see how it would work.
the stock style intake is a direct bolt on, we have 11,12,14,15 degree heads all angles are optional with either the cathederal port or the raised c5r port. so the answer to the questions, we do not roll the deck to achieve valve angle, thestock style manifold will fit the 11 degree, and the outside shape of the cylinder head has not changed other than the raised valve cover rail. We will post some pics.
06-02-2005, 07:58 PM
#16
Originally Posted by cary et performance
the stock style intake is a direct bolt on, we have 11,12,14,15 degree heads all angles are optional with either the cathederal port or the raised c5r port. so the answer to the questions, we do not roll the deck to achieve valve angle, thestock style manifold will fit the 11 degree, and the outside shape of the cylinder head has not changed other than the raised valve cover rail. We will post some pics.
SDB
