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Hello,
A mate of mine is looking at buying a HZ ute. The owner claims that it has a 308 stroked to 383 with VN heads, but he does not have any proof of the above mods.
My question is how can we tell if the motor is a 308 not just a 253 with VN heads.
He also claims that it is making around 400hp but does not have a dyno chart. Does this sound about right ?
Thanks for your help and comments.
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it is written on the passenger side of the block above the sump at the front of the engine.
but no 253 is gonna drive like a 383. ask him for the engine builders phone number.
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He does not have any of the details of the engine since it was like that when he bought it. Is it still possible to fit VN heads on a 253. We also could not find 308 on the block. The car does go hard, but I would not know if it is a worked 253 or a mi
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A 253 with VN heads would be very doggy down low. The VN heasd have large valves, similar to the Brock heads, L34 etc. Large valves on a 253 make them loose seom low down torque and it recommended to keep standard size vales on a 253 unless going for larg
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What is the engine number? What gearbox is behind it? Is there an adapter between the block and the box? All of these may solve your query. 253 and 308 blocks are physically identical externally bar the gearbox bolt pattern on an 308 auto HJ (late 1974) t
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Thanks for that info.
The gearbox is a triamatic but not sure on engine number. Is it possible to stroke a 253 to 383. Sorry about all the questions but we want to make sure evreything is OK before we pay any money.
Cheers
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Thanks for that info.
The gearbox is a triamatic but not sure on engine number. Is it possible to stroke a 253 to 383. Sorry about all the questions but we want to make sure evreything is OK before we pay any money.
Cheers
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from memory i saw an article detailing a 310 stroker for a 253, but this was expensive. 3K plus.
Ive never seen one on the street.
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if its a 308 it has to have 308 cast into the block. its on the side near the welsh plugs, you have to get underneath and look up at it.. use a torch.. its a bit hard with extractors but you must find it if you want to know. its only on one side. as for b
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If it's a trimatic and the block has not been redrilled that narrows it down to a 253, a 308 pre HJ, a 308 post mid WB/VC to VL and any manual 308. In other words not a lot. You can't make a 253 into a 383 as you need a 4.030 inch bore for this, and the 2
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If you can't find the "308" or "253" stamped on the block then it has been removed or is not a Holden engine. I wouldn't touch it unless I was happy with the way it drove and prepared to take a chance. There are plenty of genuine 308s
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COME 3.75" stroke cranks (383) are internally balanced.
253 bore is actully 3.625, not that it is important in this discussion
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Funny how the brain thinks one thing and types another. Here I am thinking 3 5/8" and I type 3 7/8". Wasn't aware of the internally balanced Holden 383 crank though. Guess I'm used to the 400 crank in a 350 trick. I also forgot to add the other
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Hi Guys.
The other numbers for 304/308 blocks are VB, VC, VG plus all of the genuine replacement blocks (ie those beginning with N or N5 if it's blue or black).
Also LH & LX auto blocks are Aussie Tri-Matic pattern.
Regards.
Dr
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Plus the one I forgot in my previous post - HP on the side of the HT 308 block. I think this particular block was only in the early HT Brougham as it was the only HT that the 308 was available in until the 307 stocks ran out. The other block I'd be intere
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I think Scott has hit the nail on the head with the VN heads....
VN heads on a 253 will go crap due to the valve size. If you can establish that the heads are indeed VN, and the engine performs extremely well, then you can fairly safely assume that the e
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The car does go well but I would have no idea how a 383 should go compared to a 253 would there be a huge difference. Also the diff is a 9 inch (showed us receipts) he said that it is a "true trak" (whatever that it) ratio is 3.25 he also said
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The diff is the goods, and could well indicate an engine with gobs of torque. But the next question is - are you sure it's a trimatic?
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Yep sure it is a trimatic showed proof of rebuild plus 2500 rpm stall converter. Transmission also had a stage 2 shift kit put in at time of rebuild. Also the manifold is a dual plane Torque Power manifold with a 700 DP holley carb.
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Did you know that HDT 427 Monaro they were spose to bring out was actually a S/B 350 stroked to 427?...But to stroke a 308 to 383, they would have to have a custom made crank, rods, pistons the whole lot. Hard to believe someone would goto all that troubl
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