Holden V8  

i could be wrong but i think they have a bigger bore too

6th March 2003 - 04:39 AM  Reply  Quote

I think TwinCam16 is right about the bigger bore size

6th March 2003 - 06:06 AM  Reply  Quote

twin cam16 and hoon_01 are 100% correct same crank and rods but a 308 has a bigger bore than a 253

to make a 253 a 308 u need to bore it out and put bigger pistons into it so the answer to your question is no

6th March 2003 - 07:20 AM  Reply  Quote

Ok thanks for the help. At least it can still be done.

6th March 2003 - 03:57 PM  Reply  Quote

that way i can bore the 253 change the rods, crank and pistons change the heads to VN efi ones and pretty much ive got a VN V8 but technically (for legal reasons) its a 253. I am very happy now. ha a loop hole in the system.

6th March 2003 - 04:02 PM  Reply  Quote

until you have a massive acco, they sieze your car, strip the motor, see the mods then void your insurance...

6th March 2003 - 04:33 PM  Reply  Quote

dont waste ur money man, jus go and get a 308 much easier and less work!

6th March 2003 - 05:14 PM  Reply  Quote

i agree. 308 is the way to go.

6th March 2003 - 05:24 PM  Reply  Quote

This is to go in the 280zx. so the less power the engine has when it goes in the easier it is to get complianced. with the 253 the engine doesnt have to have engineering aproval where as a 308 does. the 253 actually has less power than the standard L28 out of the zed so there is no need to provide engineering compliance. yet once the motor is in i can do what ever i want to it and hence do the above mods. as for insurance at the moment its only insured for fire and theft.

6th March 2003 - 05:46 PM  Reply  Quote

dude a red 308 stock only has like 115kw n e way!

6th March 2003 - 05:48 PM  Reply  Quote

And a 280z has 105 or something like that. and a 253 is 90 something. plus i would have ended up stroking and boreing the engine anyhow so its not a problem as in time and money.

6th March 2003 - 05:51 PM  Reply  Quote

hahaha them 253's are raw power, lmfao thats so sad!

6th March 2003 - 06:22 PM  Reply  Quote

Thats why im pondering the idea of twin turboeing it. im a mechanical engineering student so it would make a good project.

7th March 2003 - 02:21 AM  Reply  Quote

I used to have a 253 with....wait for it.....corvette heads graphed on. Don't ask my how or why or even who did it, I bought it like that. Fucker made a massive piston slapping noise under full tilt, and it beat a VLT one night. Dunno if it was stock or whatever...crazy.



If ya wanna save some fuel, go the 253, it's lots of fun with a m4 tranny.

7th March 2003 - 05:27 AM  Reply  Quote

not to mention how heavy (i'm guessing here) the 253 would be compared to the 308.. and how it would turn it into an understeering pig.



Luke.

8th March 2003 - 04:58 PM  Reply  Quote

yeah even for a motor built in the 70's its pathetic a mk 1 capri 3l v6 has more power than a 253, and a ford 302 had 140kw's



i doubt anyone will pull apart your block and measure the capacity they will just look at the 253 stamped on the side of the block if they even go that far, its a bit of work but if you wanna get away with it its the best idea, if it were me i'd be putting a different engine into it

if u are set on putting into it go a v8 go a 289 windsor u can stroke it out to 347 and u can put some decent heads on it and have it efi no probs (think 2002 TE50 heads rods crank and injection)



i reckon a 280z needs a nissan motor tho i'm not a big fan of nissan motors in holdens (vl excluded) and vice versa



nissan motor's are very cheap and disposable these days

8th March 2003 - 10:56 PM  Reply  Quote

buy a toyota cresida half cut with the 4l quadcamv8

the cut will set u back 2200 and id have it in the car and registered 4 less than u will make ur motor into a efi308 and it will shit all over the 308

8th March 2003 - 11:31 PM  Reply  Quote

the quad cam v8 won't have as much torque as the 308 tho

9th March 2003 - 12:26 AM  Reply  Quote

Hmm lets see.

You take a standard HQ.

You remove the heads, manifold and cam, replace heads with VN item, replace manifold with Harrop item and replace cam with VN cam.



Then you start the car again and watch the 12 second quarters appear out of nowhere.



Not bad for a pushrod. Not bad for fuck-all dollars worth of work.



(it should be noted that in the interests of reliability you will need a much bigger radiator and water pump, a big fuck off carby (750 4 barrel holley is a good start) etc)

9th March 2003 - 12:32 AM  Reply  Quote

From the ones I've seen that have done that exact conversion, the first thing to go was the radiator after they got sick of overheating in anything less fast paced than freeway traffic

9th March 2003 - 12:49 AM  Reply  Quote

yeah it should be good when its finished and once i pay off the $5000 spray painters bill. i know it probably should have a nissan motor but its something different. i have had two holdens with nissan motors so its time i got a nissan with a holden motor. the engine has done 11,000k's so its in excellent condition, does anyone know how good the 4 speed manuals are for the V8's, i did get a quote to convert it to supra 5-speed for $1300. but its still money. and does anyone know what a set of rods, pistons and a crankshaft for a 308 would be worth.

11th March 2003 - 06:55 PM  Reply  Quote

Do you have new pics since it's been sprayed?



5k is a lot of cash... was there a lot of rust/straightening to be done?

12th March 2003 - 12:51 AM  Reply  Quote

no sorry i dont have any pic's yet but ill put them up when i get some. the car was almost all rust about 10% metal, oh and 70%bog, 5% alfoil (god knows why) and 15% rust. the car will still be about 4 to 6 months off completion because i have to save up to have all the interior re done. before krawler mention putting VN heads on and another manifold what sort of power would a 308 make with that.

12th March 2003 - 04:07 AM  Reply  Quote

KRAWLER i guess wif a old hq yea u wold change the radiotor! sorry!

12th March 2003 - 04:20 AM  Reply  Quote