Trex with 243's??
#1
Trex with 243's??
Alright so I have a collection of parts that are itching to go on my car, one of them being the short armed dinosaur(cam). A buddy of mine offered me a good deal on some 243 ls6 heads and brought it up to a friend of mine and told me that they might not work together because of different valve sizes. To my knowledge they have same size valves but smaller combustion chambers compared to 241 heads.
So does anybody if they would work together or not?
Also if I do get the heads, of course I'll be replacing lifters and using mls head gaskets and I already have 7.4 pushrods, will I have any issues with these pushrods? I heard for this cam you need stock size pr's but thunder racing package sells them with 7.4's?
So does anybody if they would work together or not?
Also if I do get the heads, of course I'll be replacing lifters and using mls head gaskets and I already have 7.4 pushrods, will I have any issues with these pushrods? I heard for this cam you need stock size pr's but thunder racing package sells them with 7.4's?
#4
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Always measure no matter what scenario! If me i would go ahead and flycut anyway just so i could mill the 243's to bump the compression. AI can cnc the heads to make the cam fit withput flycut i would check out his 500$ head work to get a cnc valve job and deck resurfacing and make fit your cam.
#5
Well that sounds like a good idea but its not in the budget really since my t56 took a **** on wesnesday lol. If there actually is issues with the setup i may just do the cam swap and save the heads for my second gen if i decide to keep it or get them worked on later.
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#10
with a big cam like that also consider some trunnion bearing upgrades.valve train geometry is very crucial with high rpm cams.and look at a little thicker head gasket to maybe gain some extra clearance.get some good valve springs.Damian specs a cam that makes great power .
#11
TECH Senior Member
In any case TREX should have PTV measured.
Originally Posted by garygnu
with a big cam like that also consider some trunnion bearing upgrades.valve train geometry is very crucial with high rpm cams.and look at a little thicker head gasket to maybe gain some extra clearance.get some good valve springs.Damian specs a cam that makes great power .
#16
TECH Senior Member
Correct, smaller chamber is not from milling but from design. Valve drop are the same. Valve drop is the distance the valve travels when it free drops and contact piston (from full seated position to piston at TDC without spring). This is on same motor. On different motors it could be different if piston to deck height is different.
#19
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Correct, smaller chamber is not from milling but from design. Valve drop are the same. Valve drop is the distance the valve travels when it free drops and contact piston (from full seated position to piston at TDC without spring). This is on same motor. On different motors it could be different if piston to deck height is different.
Even I don't know everything contrary to belief!!!
#20
youll always need to measure. its going to be very tight. some people have no problem, and some people have ptv problems with stock heads and a t-rex. If it is too tight, you can always flycut a little