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yella terra heads

woteva

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I don't think they are from the pics you have posted. Last set of Yella Terra heads I saw had YT on the casting - not stamped.
Are the rockers engraved ?
 

Damo1991

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Yeah they are engraved mate.. yeah i was told the car had yella terra heads when I bought it but now looking in to it I don't think they are witch is disappointing.. ive just had it tuned and got 240rwkw and based on them figures I thought it would be yella terra but not looking that way ... its just got the yella terra rockers
 

vc commodore

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From memory, Yella Terra heads have a round tube where the head bolts go through, rather than a solid piece of casting

Yella Terra rockers should have the letters YT stamped on them.....If they are Yella Terra roller rockers, it doesn mean the heads are made by the same company....Yella Terra make roller rockers for just about any motor
 

Damo1991

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Yeah my guess is they are not yella terra heads just the yella terra roller rockers I can not find any YT stamp or anything other stamp or numbers to state they are yella terra .. although ive only pulled covers off and had a look
 

shane_3800

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They look like cast iron yella terra heads are alloy.
 

Damo1991

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Yeah they are cast but I just rang a rep at yella terra and he said the older style heads that they used to make where cast iron.. bloody cars I tell ya lol .. wanting todo more to my car and its all in heads but trying to figure out what they are without taking them off seems impossible ‍♂
 

gtrboyy

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Stock heads cleaned up even with std valve size will do 450hp at motor if it has all the right parts comp/cam/intake etc
 

Damo1991

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Stock heads cleaned up even with std valve size will do 450hp at motor if it has all the right parts comp/cam/intake etc
Hi mate yeah its running come racing duel throttle intake wade special cam haltech platinum computer. The tune i had done i hit 270rwkw but backed it off to 250 so yeah with a cam upgrade and port and polished heads cnc etc should make some wicked power
 

gtrboyy

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come twin throttle work great f/i not the best n/a compared to single plane.

Only when aiming for n/a 500hp or more do you start to need larger valves & pocket porting with decent comp bump...it's also when really need to start looking at how to keep them together like oil mods,arp rod & bolt kits.

It makes f/i look like a smarter choice when compare results to hipo n/a 355...but they sound so good!!!
 
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