Supra valve gear.

[dass]

Hi All,
After looking into using 2jzgte exhaust valves in my 1uz-fe build up
I noted the the exhaust valves are longer(as the lextreme site shows)but looking a little further I have noticed that the supra buckets are thinner so the use of the supra valves will be an easy up-grade with the matching bucket.
Hope this is of interest. Darren .

 

[Lextreme II]

I really dont think changing the bucket would work. GTE valves are 1/4" longer and there is no way the bucket will compensate for that. However, if you can regrind the cams that might work, but the valves might interfer with the pistons.

 

[ed_ma61]

regrinding cams to change the base circle on bucket type heads is a bad idea

 

[Lextreme II]

Yes it is.... It was just a suggestion to solve the 2jzgte valve issue. I wound not do that personally.

 

[dass]

I am up-grading the exhaust valves only for three reasons 1.. the exhaust valve suffers from the most thermal stress. 2 ... I think the most improvement in a F.I
will come for the exhaust side. 3. cost . The supra exhaust valves are 2.083 mm longer and the supra bucket is 2.? thinner, so it does work on the exhaust.I have a full set of spare supra valve gear, but am using new exhaust valves ,performance springs ,Ivan tighe billet cams similar to kelford 207-t2 .In the bottom a set of 8.5 comp. Ross pistons .Arp Rod bolts and ACL race series bearings.Outside a GT4245 turbo .Sm2 Autronic. The idea of have a set of bodgee cams to suit the valves does not appeal. Darren

 

[Lextreme II]

Sounds like a nice package. I have never done the Supra Valve, so i am just giving you what i have seen. However, your project sounds very interesting and love to see more. How much hp are you looking for? GT42 is rated at 900-1000 hp.

 

[dass]

At the moment the gt4245 is on the 2jzgte and is producing 440 rwkw, so was looking to run much the same HP but with more mid-range and quicker spool up.
Darren