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RB30DE power??

08Elf

By 08Elf,
in Engines & Forced Induction

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geordie Proficient

geordie

Posted
Posted

Im sure you will find one if you shop around. It always pays to search and not to rush into a purchase. Wether it be a single part or a whole car.

Hell, post a "wanted to buy" add in the classies on this website, worked a treat when i was looking for bits n pieces for my car. There are alot of ppl with access to parts etc on these forums.

dondesoto Community Regular

dondesoto

Posted
Posted
Thanks geordie, how much extra is a manual half cut?

I read that whole RB30 thread ages ago, and I know about the oil galleries. But I recal something comming up about the VVT not being better... something about the the VVT only making up for lost power from smaller cams nissan used for emmisions....   Can anyone clarify this?  Sounds like VVT head with non VVT cams would be the go.    

Don, I just looked at you pics.  That is one sweet sleeper.   What is the economy like on the beast?    Do you think an LSD and some cams would bring you a 13?

yep the red wagons a sleeper , totally stock looking , standard hieght and wheels . at moment have put roll cage in for going to speed trials in 3 weeks . fuel economy is ok , almost run out of fuel the other day it took 55 ltrs for 490kms travelled .

maybe 4.11 gears with a locked diff , cams and the head ported should see high 13s for the 1/4 . i have got a spare head to play with , will get it done one day .

DennisRB30 Community Regular

DennisRB30

Posted
Posted

Sounds about the same econ as a standard RB30E. I don't think you would need to port head for a 13.9, I'm sure the standard cams are tiny and some big ones would make a huge power gain. They would probably cost a mint though. Are you from/or visit redcliffe sometimes? I have seen a wagon that looks very similar to yours around there a few times.

dondesoto Community Regular

dondesoto

Posted
Posted
Sounds about the same econ as a standard RB30E.   I don't think you would need to port head for a 13.9, I'm sure the standard cams are tiny and some big ones would make a huge power gain.   They would probably cost a mint though.   Are you from/or visit redcliffe sometimes?   I have seen a wagon that looks very similar to yours around there a few times.

cams cost around $900 -$1000 . no not from redcliffe have been there a few times . i use the wagon as my work vehicle so i get all over brisbane . am taking it to lake gairdner speed trials in south australia in just over 2 weeks

Cubes Grand Master

Cubes

Posted
Posted
But I recal something comming up about the VVT not being better... something about the the VVT only making up for lost power from smaller cams nissan used for emmisions.... Can anyone clarify this? Sounds like VVT head with non VVT cams would be the go.

Its a load of crap buddy.

The RB25DET VCT cam specs are the same as the R33 RB25DE and RB20DET but with different center lines.

The VCT adjusts the inlets centerline so there is less overlap in the low/mid range but larger overlap in the top end.

If you were to have the larger overlap at idle the car motor would idle like crap almost as if it were running a large cam.

suiram Newbie

suiram

Posted
Posted

I have an RB30DE in my R33 S1 now for 18 months. Theres a picture on this thread (page 1) by Skyla dated 30/01/05 of my conversion. I Have a RB25 S1 head, with RB20DET inlet cam. This is so adjustable cam wheel can be fitted when I have time. The throttle body is a self made 80mm leading to a trust filter behind the bumper above the splash panel. RB20DET injectors fitted (top mount) are feed by an adjustable fuel pressure regulator set to 37 psi. Exhaust is via coby extractors to 3" exhaust with 2 mufflers.

So far only problem was using a bolt for the second idle pulley. This broke as I was pulling into my car park at work causing cam belt to slip over cam wheels. There was no damage by piston / valve contact. It now has a stud fitted similar to the original one.

My complete conversion so far is about $3000 with manifold being the greatest expense. I have 137 rwkw at the moment and the car is my daily driver.

For all you N/A fans, You don't need a turbo to have fun. My personal number plate is SLOG (slight lack of grip).

HAVE FUN

  • 2 weeks later...
redline2003 Community Regular

redline2003

Posted
Posted

Suiram nice work on the engine mate. Can i ask what plenum you have on it? At first i thought it was a GTR plenum but now it could be a Greddy one. Also were the extractors custom made by Cobe? Cause they sure look better then the coby ones ive seen. Nice work again. Hows the response and power delivery?

suiram Newbie

suiram

Posted
Posted

Thanks, Inlet is a trust plenum and extractors are HPC high temperature coated coby. The car pulls like a tractor, 1000rpm to 7500rpm. Dyno sheet has 2 straight lines, torque horizontal and power upwards till cutout. Its nice to drive and fuel economy is good too.

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