FFF query

Author
Discussion

TAM747

270 posts

248 months

Saturday 19th September 2015
quotequote all
please don't forget, most tvr's are in uk and you can't go very fast for let's say 10 min. full throttle, as for example in germany ;-)

a german sp6-expert told me: 4.3L is the maximum for longer time in "full speed" as otherwise the headgasket will blow, even if it's a/the "special"-one.

so bigger than this 4.3L are not ideal for long time full-throttle, as the distance between the sleeves is to (or much to) little.

Edited by TAM747 on Saturday 19th September 09:25


Edited by TAM747 on Saturday 19th September 09:36

Andy_mr2sc

1,223 posts

175 months

Saturday 19th September 2015
quotequote all
Has no one tried ringing the block to prevent this?

joecat

Original Poster:

10 posts

126 months

Saturday 19th September 2015
quotequote all
Thanks for posting this information DWix. I'm not planning any long road trips like yours or Don1 but it would be nice to know (regardless of upgraded or standard rebuild) that this wouldn't happen if put to the test! I guess that's one of the reasons that Jason adds some extra machine work into his 4.3 rebuilds for added cooling.

m4tti

5,426 posts

154 months

Saturday 19th September 2015
quotequote all
joecat said:
Thanks for posting this information DWix. I'm not planning any long road trips like yours or Don1 but it would be nice to know (regardless of upgraded or standard rebuild) that this wouldn't happen if put to the test! I guess that's one of the reasons that Jason adds some extra machine work into his 4.3 rebuilds for added cooling.
Your not going to change the water paths in the block or standard head. The fff resolves the nonsense oil pressure you get with the standard head.

Theres a few threads on here where power rebuilds have failed at the head gasket, and the str8six build that dwix mentions. Clearly then if the cooling system is functioning correctly there must be a more fundamental issue. For example the head gasket does not meet the necessary requirements or there is pre-detonation/detonation, compression is ratio too high etc

Edited by m4tti on Saturday 19th September 13:06

Don1

15,936 posts

207 months

Saturday 19th September 2015
quotequote all
TAM747 said:
please don't forget, most tvr's are in uk and you can't go very fast for let's say 10 min. full throttle, as for example in germany ;-)

a german sp6-expert told me: 4.3L is the maximum for longer time in "full speed" as otherwise the headgasket will blow, even if it's a/the "special"-one.

so bigger than this 4.3L are not ideal for long time full-throttle, as the distance between the sleeves is to (or much to) little.

Edited by TAM747 on Saturday 19th September 09:25


Edited by TAM747 on Saturday 19th September 09:36
Interesting - but these are 4 litre engines - the bottom remains the same. smile

m4tti

5,426 posts

154 months

Saturday 19th September 2015
quotequote all
Don, did yours start losing coolant?

TAM747

270 posts

248 months

Saturday 19th September 2015
quotequote all
Don1 said:
TAM747 said:
please don't forget, most tvr's are in uk and you can't go very fast for let's say 10 min. full throttle, as for example in germany ;-)

a german sp6-expert told me: 4.3L is the maximum for longer time in "full speed" as otherwise the headgasket will blow, even if it's a/the "special"-one.

so bigger than this 4.3L are not ideal for long time full-throttle, as the distance between the sleeves is to (or much to) little.

Edited by TAM747 on Saturday 19th September 09:25


Edited by TAM747 on Saturday 19th September 09:36
Interesting - but these are 4 litre engines - the bottom remains the same. smile
yes you are right, but for future revisions thinking about increasing ccm's smile

Don1

15,936 posts

207 months

Saturday 19th September 2015
quotequote all
TAM747 said:
yes you are right, but for future revisions thinking about increasing ccm's smile
whistle

Tvr Power

1,076 posts

205 months

Wednesday 11th November 2015
quotequote all
m4tti said:
joecat said:
Thanks for posting this information DWix. I'm not planning any long road trips like yours or Don1 but it would be nice to know (regardless of upgraded or standard rebuild) that this wouldn't happen if put to the test! I guess that's one of the reasons that Jason adds some extra machine work into his 4.3 rebuilds for added cooling.
Your not going to change the water paths in the block or standard head. The fff resolves the nonsense oil pressure you get with the standard head.

Theres a few threads on here where power rebuilds have failed at the head gasket, and the str8six build that dwix mentions. Clearly then if the cooling system is functioning correctly there must be a more fundamental issue. For example the head gasket does not meet the necessary requirements or there is pre-detonation/detonation, compression is ratio too high etc

Edited by m4tti on Saturday 19th September 13:06
If Power had an head gasket issue i'd be on the case immediatly, fortunately because i've tested our product well before we sell to the public i have zero head gasket failures,"NOTE" head gaskets are the biggest manufacturing failure in the motor industry, Powers engines will never come across this unless mapped incorrectly or block thread failure. most failures are caused by mechanical ignorance if the rad or hose fails

Dom

m4tti

5,426 posts

154 months

Wednesday 11th November 2015
quotequote all
Tvr Power said:
If Power had an head gasket issue i'd be on the case immediatly, fortunately because i've tested our product well before we sell to the public i have zero head gasket failures,"NOTE" head gaskets are the biggest manufacturing failure in the motor industry, Powers engines will never come across this unless mapped incorrectly or block thread failure. most failures are caused by mechanical ignorance if the rad or hose fails

Dom
Presumably you used bolts not studs on the rebuilds with the block thread failures?

DonkeyApple

54,932 posts

168 months

Wednesday 11th November 2015
quotequote all
I think my car has done 12k miles now. Needs a service but it's now tucked away until Spring. Other than that the engine is simply superb.

What the head does is amplify the wonderful character of the S6. It's even more revvy, much smoother and just great fun to work through the gears. I'd catagorically recommend it if you prefer I6 character over V8. I'm over the moon with mine.