Destroyed Engine

[brassil]

u all say that porting an rb20 head doesnt flow much but im flowing not much more then a rb26. i did think of this before i started and me and the engine builder talked it all out and made sure it could flow easily enough for what i wanted. and i still got my rev happy rb20 that i had reving to 9500 rpm and didnt skip a beat that what i had it built for with the turbo my power band doesnt start till about 5500 rpm but it worked great till the belt snapped. but the head is getting fixxed and isnt cosing much its just the block which im still unsure about. and legal bullshit that i prob about to go threw with the belt company which i dont know who to speak to about it

[Guilt-Toy]

i admire the fact that your passionate about your rb20, and the big revs does sound kinda sexy...

good luck with the re-build, keep us posted with pics mate

[bubba]

*cough* 30 *cough*

[Guilt-Toy]

yes it can have you struggling for air sometimes.

*cough* 30 *cough*

[msnismo]

: dave here:

umm. 5k on head? pics of said 5k worth of work?

dude put it in the bin and start over...... and a snapped belt after 100kms? sure you wernt getting coil bind on the valve springs? what cams were they? and lift?

what springs were used?

that head is rooted, just get another one and start again. or, get a stock 25 with nothing done to the head and get the same power....

[brassil]

what is coil bind. lift i dont know but they r reground gtr v spec cams and 100kms it was a manufacture fault in the belt and now the whole fix is under warranty but the fix is for standard rebuild but im puttin 26 crank and stuff thou it

[Bumblebee]

so the "new" belt snapped.... was it over tensioned?? because if it wasnt, id be callin the company up and gettin warranty on the shit.

faulty worksmanship

edit: im a lil late i think lol

Edited June 6, 2008 by Bumblebee

[msnismo]

:Dave here:

its where the spring is stacked solid.. ie to much lift for the standard springs.. you are using uprated valve springs arnt you? 5k on a head id assume you had some nice oversize valves and solid lifters?

what were the STOCK RB26 cams reground to?

[brassil]

i dont know the exact specs but i will find out tuesday orr wednesday but from memory about stage 2 for a gtr and all the springs and lifters were to suit it he reckons that i could rev over 10g rpm which i would never try even if it can

[-_-StRyDeR-_-]

sounds like you have been taken for a nice ride, and someones made some nice money out of you.

that head would now be useless, go buy a rb25. and put your turbo etc onto that.

[legend01]

the poor ole rb20det is still underated but a damn good engine ,with the right work done to them they can make good power mine made just a tad over 300rwkw with a smaller turbo than the one you have and ran an high 11 quater mile so if you spend the dollars the power is there

Peter