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R34 Rb25det To Rb30 Conversion

SKYLINE SAMOA
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urtwhistle Proficient

urtwhistle

Posted
Posted

My Bonnet wont shut damn it!!!!!! the R34 bonnet height must be slightly different to the R33 When using a stock manifold as it is hitting on the BOV flange. I redrilled the engine mounts as per the manual but it still isn't quite low enough. It just gets on the 1st click of the bonnet latch, So I will try washers on the bonnet hinge and or chop the top lip off the BOV flange and re tap a bolt in lower.

I'll let you know what I do to get around the height problem, but a Greddy plenum would have been the easiest solution while the motor is out.

Chris

bubba Grand Master

bubba

Posted
Posted
My Bonnet wont shut damn it!!!!!! the R34 bonnet height must be slightly different to the R33 When using a stock manifold as it is hitting on the BOV flange. I redrilled the engine mounts as per the manual but it still isn't quite low enough. It just gets on the 1st click of the bonnet latch, So I will try washers on the bonnet hinge and or chop the top lip off the BOV flange and re tap a bolt in lower.

I'll let you know what I do to get around the height problem, but a Greddy plenum would have been the easiest solution while the motor is out.

Chris

Did you slot the engine mounts?

Are you still using T/C? if not, I can give you an RB20 crossover pipe to try, it mounts teh bov in a different orientation.

Mine only hit on the lip of the timing belt cover and forward corner of the intake manifold.

Let me know if you want me to come take a look Chris :thumbsup:

urtwhistle Proficient

urtwhistle

Posted
Posted
Did you slot the engine mounts?

Are you still using T/C? if not, I can give you an RB20 crossover pipe to try, it mounts teh bov in a different orientation.

Mine only hit on the lip of the timing belt cover and forward corner of the intake manifold.

Let me know if you want me to come take a look Chris :woot:

Hey Bubba, cheers for the offer I may take you up on that at a later point.

Yes I slotted and rewelded the engine mounts to the max. I'm still using the T/C throttle body but it has no butterfly fitted. It didn't end up hitting the throttle body it self but the rubber sleeve between the throttle body and the cast aluminum pipe that the BOV mounts to.

what I ended up doing is cutting a small slot out of the bonnet to clear the joiner/throttle body. Then took a ball peen hammer to the crappy Just jap IC pipe that runs accross the radiator. as it was clashing with the CAS sensor. the piping looks like crap but its good enough to get the car running on and i'll get a replacement bent up later as i have well and truly used up all the goodwill with borrowing my mothers car.

A simpler fix would have been to use a R33 throttle body and get a pipe bent up to replace the cast ally peice.

regards

chris

bubba Grand Master

bubba

Posted
Posted
Hey Bubba, cheers for the offer I may take you up on that at a later point.

Yes I slotted and rewelded the engine mounts to the max. I'm still using the T/C throttle body but it has no butterfly fitted. It didn't end up hitting the throttle body it self but the rubber sleeve between the throttle body and the cast aluminum pipe that the BOV mounts to.

what I ended up doing is cutting a small slot out of the bonnet to clear the joiner/throttle body. Then took a ball peen hammer to the crappy Just jap IC pipe that runs accross the radiator. as it was clashing with the CAS sensor. the piping looks like crap but its good enough to get the car running on and i'll get a replacement bent up later as i have well and truly used up all the goodwill with borrowing my mothers car.

A simpler fix would have been to use a R33 throttle body and get a pipe bent up to replace the cast ally peice.

regards

chris

Nice work, but the most important question is, skids?:)

I have to find some time to duck up to the workshop and pull my pistons out, then I can send everything to the machinist!

urtwhistle Proficient

urtwhistle

Posted
Posted
Nice work, but the most important question is, skids? :)

I have to find some time to duck up to the workshop and pull my pistons out, then I can send everything to the machinist!

Not yet mate, 36k's on the clock and its painfull I just wanna give it some Revs damn it. It's booked in for a quick run in tune on tuesday then I wont have to fear about leaning it over 3-4krpm.

Josh DO IT, it has so much torque every where compared to the Rb25 with a hiflow. I mean 3rd gear 2krpm from walking pace tractored straight up a damn steep hill.

chris

bubba Grand Master

bubba

Posted
Posted
Not yet mate, 36k's on the clock and its painfull I just wanna give it some Revs damn it. It's booked in for a quick run in tune on tuesday then I wont have to fear about leaning it over 3-4krpm.

Josh DO IT, it has so much torque every where compared to the Rb25 with a hiflow. I mean 3rd gear 2krpm from walking pace tractored straight up a damn steep hill.

chris

Ugh run is so painful hehe

Shoot me a PM when you're ready for skidz and I'll bring the vidcam down :D

  • 1 month later...
Redliner007 Enthusiast

Redliner007

Posted
Posted
Hey Bubba, cheers for the offer I may take you up on that at a later point.

Yes I slotted and rewelded the engine mounts to the max. I'm still using the T/C throttle body but it has no butterfly fitted. It didn't end up hitting the throttle body it self but the rubber sleeve between the throttle body and the cast aluminum pipe that the BOV mounts to.

what I ended up doing is cutting a small slot out of the bonnet to clear the joiner/throttle body. Then took a ball peen hammer to the crappy Just jap IC pipe that runs accross the radiator. as it was clashing with the CAS sensor. the piping looks like crap but its good enough to get the car running on and i'll get a replacement bent up later as i have well and truly used up all the goodwill with borrowing my mothers car.

A simpler fix would have been to use a R33 throttle body and get a pipe bent up to replace the cast ally peice.

regards

chris

So if im using the r32 rb25de head with standard throttle body and piping It should prevent the fouling on the bonnet if i get the mounts to sit as low as possible? Im not too keen to go front facing if i don't have to.

urtwhistle Proficient

urtwhistle

Posted
Posted
So if im using the r32 rb25de head with standard throttle body and piping It should prevent the fouling on the bonnet if i get the mounts to sit as low as possible? Im not too keen to go front facing if i don't have to.

just remove the nice cover off the bonnet put a big dollop of grease along your throttle body to BOV. drop the bonnet down see were its got grease. pull out trusty 5" angle grinder and remove the small peice of bracing. bonnet sorted. But you still need to drop the motor to the absolute max, and for good measure i put 2 washers under the bonnet hinge and lifted the bonnet latch a few MM.

Redliner007 Enthusiast

Redliner007

Posted
Posted

and chuck the cover back on? Im just concerned as I'm planning on getting the car all certified for the streets afterwards and don't want it to effect that. How is your conversion coming along anyway?

urtwhistle Proficient

urtwhistle

Posted
Posted

yeah mate, just spray some primer over the raw edges and then put the cover back on. what you can't see aint gonna hurt them mate. its not like you have removed all the bracing . just 100x100mm square.

My cars running and tuned done 2000k's, made 366hp 500nm @ 5500rpm. needs a little more boost and she will be sweet.

Redliner007 Enthusiast

Redliner007

Posted
Posted

Nice mate!!! Is this in your r34? You got any pictures of how she's sitting in there? I can't wait to start my conversion aye, just need to get rid of my r33 first get pay off some bills before i get into it lol.

366 5000nm thats nice man bet it pulls hard. What turbo and boost are you running urtwhistle?

Redliner007 Enthusiast

Redliner007

Posted
Posted
I'll have to take some pics, the turbo is a hypergear 3576. running 16psi. it doesn't make massive power but its mega fun to drive.

366hp still a decent amount for the street tho :happy: I bet it is a lot of fun!!

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