redline for the stock 8v 900 heads

[s900t8v]

whats the redline for the stock 8v heads

I know the 8vs had problems with valve bounce, what can you take it out to?

cheers

also what springs do people run to increase the redline? just out of interest

[Crazyswede]

Expect valves to float around 6000 rpm and up. You can get double valve springs to help eliminate....8000 is around the top that most people spin them when setup properly.

[s900t8v]

thanks my limiter is set to 5k... safe but its a dd... the te05-12b reallly sucks past 5k anyway

there was one guy a while back who said hed floated and killed 2 heads on his 8v... I really hope he or someone may know the link for the thread for some 100% rpm figures! lol

cheers

[Jordan]

The bigger problem with the higher RPMs are cracking of the lifter buckets. I know DrewP suspected some float problems with his stock setup. With the modified springs and cam on my 8v B motor, I take it to 7.5k+.

[s900t8v]

thanks jordan

in reality I think if the 8v head came off the money would be spent on going to a 2.3 head

but I wanted to know. the 8v head really produces a different car, 16vs are very smooth in comparison .. the 8v feels a bit raw

[SwedeSport]

I blew up a few stock heads before I put the modified head on mine.

If you can find them... MSS made hardened lifters. Mine has them. Dual springs, oiling mods, and a trick cam.

I have revved over 8k on a few occasions. But power drops off at 6.5k. I beat this motor harder than any other. And I have never broken a lifter.

[s900t8v]

Thanks. As I said ill go to a 2.3l trionic head before anything else.

It was more out of interest.

Cheers

[Crazyswede]

Thanks. As I said ill go to a 2.3l trionic head before anything else.

It was more out of interest.

Cheers

So you mean a T5 head? Were the T5 2.0 and 2.3 heads different?

[SwedeSport]

I thought we were discussing an 8v head???

[Crazyswede]

I thought we were discussing an 8v head???

Thats where it started.

[DrewP]

T5 and T7 heads didn't change between 2.0L and 2.3L engines, they're the same.

[s900t8v]

Sorry I designated 2.3 cos I am used to people getting confused between early 9k head same as on 2.1 c900 and trionic head.

I realise t5 head is easiest way to designate lol.

Yeah I was asking about my stock 8v head. But I'm going to go to t5 head. Think a fried has a spare I might buy or trade.

Won't be for a while though because it will need chains and all sorts of stuff.