Should think again!!!

 

While i was at RB Motorsports the other day they were showing me a stunning R34 GTR totally standard but the guy had bought a 3" system with a 5" tailpipe with decat etc

 

Nothing wrong with that i hear you say!! the lack of backpressure sent part of the turbo back through the manifold and f*cked the engine!!

 

Just goes to show you that a simple mod can cause a massive amount of damage on even the best of cars!?

 

Oh and it was a 2000 reg with 20000 miles on the clock :smash:

Nothing wrong with that i hear you say!! the lack of backpressure sent part of the turbo back through the manifold and f*cked the engine!!

 

how can that happen then ?? thought the turbo blew not sucked ?? and must have been a fooooked tubby for part to come off just by modding the zorst.

how can that happen then ?? thought the turbo blew not sucked ?? and must have been a fooooked tubby for part to come off just by modding the zorst.

 

tbh i dont know but the R34 turbos are pretty strong and can handle 1.2 bar and didnt have that many miles on them.

 

bet he wished he left it standard :)

I think some skylines have roller bearing turbos , that have ceramic hot wheels and plastic cold wheels witch are very brittle and dont like too much boost ,not sure about gtrs they may have steel internals .

I think some skylines have roller bearing turbos , that have ceramic hot wheels and plastic cold wheels witch are very brittle and dont like too much boost ,not sure about gtrs they may have steel internals .

 

the gtr's have standard ceramic blades even the 34 had ceramic blades but the turbo is roller bearing so maybe thats why i dont know?

Sounds expensive.

Should think again!!!

 

While i was at RB Motorsports the other day they were showing me a stunning R34 GTR totally standard but the guy had bought a 3" system with a 5" tailpipe with decat etc

 

Nothing wrong with that i hear you say!! the lack of backpressure sent part of the turbo back through the manifold and f*cked the engine!!

 

Just goes to show you that a simple mod can cause a massive amount of damage on even the best of cars!?

 

Oh and it was a 2000 reg with 20000 miles on the clock :smash:

 

hugely doubt the above mod caused the turbo to fail.

 

if an impeller fails by loosing a blade then that happens through fatigue, if it fails prematurely then thats through abuse or material impurities.

 

the guy was most likely just unlucky.

hugely doubt the above mod caused the turbo to fail.

 

if an impeller fails by loosing a blade then that happens through fatigue, if it fails prematurely then thats through abuse or material impurities.

 

the guy was most likely just unlucky.

 

well you call Rod Bell up and the owner of the R34 and tell them lol i think what Rod doesnt know about performance cars isnt worth knowing ;)

 

what i was saying by the thread is you cant just bolt stuff onto performance cars without sometimes things going wrong including what we would class as the holy grail of jap cars the R34 so its no wonder if someone buys a 15 year old datson and fits some mods and it all goes wrong and they wonder why ;)

 

wasnt saying anyone who fits a big exhaust will break there engine but more recently there are people on here who have cars which are not working well but still keep modding them :wack:

 

Mike

maybe just the combination of big bore and de-cat and a dash of bad luck

well you call Rod Bell up and the owner of the R34 and tell them lol i think what Rod doesnt know about performance cars isnt worth knowing ;)

no need to mike, i worked for a year for Holset; engine matching, part selecting and commisioning the build of prototype and production turbos for engines that will be released in 2-3 years time. I don't doubt he has masses of knowledge on performance cars, i just know a lot about turbos ;)

 

its just ridiculous to blame a catastrophic failure of a turbo and subsequently the engine on loss of backpressure alone.

 

what i was saying by the thread is you cant just bolt stuff onto performance cars without sometimes things going wrong including what we would class as the holy grail of jap cars the R34 so its no wonder if someone buys a 15 year old datson and fits some mods and it all goes wrong and they wonder why ;)

 

wasnt saying anyone who fits a big exhaust will break there engine but more recently there are people on here who have cars which are not working well but still keep modding them :wack:

completely understandable, and you should have said that in the first post. it can very easily be interpreted as ''don't fit a big bore exhaust to your car or this will happen''

Yeah this is more an incident to highlight the fact that your car needs to be in good condition for mods to work and be safe and you need certain supporting mods too. Big exhausts don't fook your turbo up, if anything there's less resistance to the turbo spinning which is better for it.

 

If you strapped a pair of T78s to a zed and whacked the boost up and blew your engine up it doesn't mean big turbos are bad.

On the early GTR's when you changed the exhaust you got a boost increase also due to the fact that the wastegate couldn't actually bypass enough flow to control the boost anymore. If the R34 is the same, it's likely the turbo overboosted and grenaged its self then some fell back into the manifold.

There's no way you can atribute it directly to lack of back pressure if anything the parts would go forward out of the exhaust - you'd need huge backpressure > cylinder pressure to force parts down the manifold and if you had that obviously the engine wouldn't run!

On the early GTR's when you changed the exhaust you got a boost increase also due to the fact that the wastegate couldn't actually bypass enough flow to control the boost anymore. If the R34 is the same, it's likely the turbo overboosted and grenaged its self then some fell back into the manifold.

There's no way you can atribute it directly to lack of back pressure if anything the parts would go forward out of the exhaust - you'd need huge backpressure > cylinder pressure to force parts down the manifold and if you had that obviously the engine wouldn't run!

 

sounds like thats what happened, tbh i didnt go into details with them about exactly how and where etc i was just commenting on how nice the car was and they said yeh until the owner put a big exhaust on it and it blew the turbo into the engine which caused alot of damage!?

 

Oh well if he can afford an R34 GTR he can afford the rebuild costs :tongue:

RB Motorsports? That Richard Bell by any chance?

LOL Dick Bell :p

 

Rod I think

LOL Dick Bell :p

 

Rod I think

LMAO @ Dick Bell!!

 

Yep, Its Rod Bell

I used to know a chap with an R33 'Richard Bell', who started up RB Motorsports, but I think the original name was RBX motorsport....Guildford...probably a different person.

RB Motorsports? That Richard Bell by any chance?

 

 

well you call Rod Bell up and the owner of the R34 and tell them lol i think what Rod doesnt know about performance cars isnt worth knowing

 

;)

wtf happened there!?! seemed to be half an hour behind!

On the early GTR's when you changed the exhaust you got a boost increase also due to the fact that the wastegate couldn't actually bypass enough flow to control the boost anymore. If the R34 is the same, it's likely the turbo overboosted and grenaged its self then some fell back into the manifold.

There's no way you can atribute it directly to lack of back pressure if anything the parts would go forward out of the exhaust - you'd need huge backpressure > cylinder pressure to force parts down the manifold and if you had that obviously the engine wouldn't run!

 

Much like the Supra I think - when they de-cat a small restrictor ring has to go in the exhaust to stop the boost rocketing over 1.2 bar, as the back pressure caused by the (two) cats is gone.

 

Thought there would be some kind of fuel cut on an R34 though?