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Hi mate, 8.900" from memory to get the right geometry and stem contact pattern.

@@Oszmz thanks mate 👍

Sorry mate the engine sold a few months ago.

For sure! Thanks mate.

Hi Mate, engine specs listed in this video link. th-cam.com/video/Q6GJgrzyFZA/w-d-xo.htmlsi=v-s529rk2aFwEupK

Thanks!

Hi Mate, I did all the machine work and assembly myself so not as much as normal. Having said that, the manifold, loom, haltech and all the efi gear cost as much if not more than what everything inside the motor cost lol. Alot of coin to make 400+hp but damn it sounds good and not another LS 👍

Agreed 👍 plus I reckon all the bad bits will be hidden once everything goes back on.

Thanks mate!

Planning to ditch the snorkel and get a VCM VT OTR to work with the setup 😎

Glad it was helpful!

Hi Mate, which part?

@@com-mod9716the hobbs boost pressure switch. I’ve planning to do this way for my water injection

Thanks mate. Seemed the easiest way at the time

Hi Mate, no LS stuff in my garage I love my 5ltrs too much 👍

Thanks Rhys! The turbo setup is for sale if you are interested.

Hi Mate, I've had the headers/crossover on and off a few times now and no issues so far.

Maybe. I Think it was a combination of a few things. Water/methanal, timing and detonation aren't forgiving to cast pistons.

Don't forget you had nos on too didn't allow for it boost ,nos cast piston ring cap . You got lucky just put another piston in it wind the boost down take the nos off it. Build a real motor in the meantime.

@@Jimmyk63 It's a water methanol plate not NOS. Thanks for the advice lol

What was your ring gap when the engine was built?

@@busarob1969 .024" on the tops. All other pistons looked fine.

Hi Mate, I used Hastings chrome moly rings. I'm tipping the manufacturing process of the newer LS factory pistons are slightly better than the 2nd hand 30 year old ACL pistons i had lying around were haha. That motor you mentioned makes twice the horsepower and boost of my motor so I'm not convinced my .024" / .025" gap was that small for what i was running. Also there was no scaping or pick-up marks on any of the bores from tight rings either. I should've just put a set of forgies in it simple as that haha. I've had a few people contact me about the setup hopefully it goes to a good home :)

Not 100% sure. Cast pistons not suite for the job, ring gap slightly too small combined with some detonation on a dyno run did it I'm guessing.

Thanks mate. Running COMP cams springs part number 941-26. No machining required and have 130lbs on the seat and 365lbs on the nose no float issues 👍

@@com-mod9716 thanks mate I am looking into a cam as well but don't really know what to get .. I am glad I come across your Chanel as I am doing everything my self had lt1 ready for mine so glad I seen this.. good to see someone else keeping the 304 alive appreciate any tips

Yeah maybe. I'm hoping to pull the motor out/down next weekend and will post a video as soon as I find the issue 👍

I can't remember exactly what I gapped them at but I do remember giving them a few extra thou. I will measure a couple when I pull the motor down.

Hi Mate, if your heads are already machined for positive stem seals then yes you can just slide them off and replace them at the same time as switching out the springs.

@@com-mod9716 thanks but they are just standard heads

Thanks mate.

Nope! At least not the passenger head, thinking I've broken the rings on #2. Will post an update video shortly mate.

Ahh yes…

Thanks mate. Will post an update video shortly

Thanks Neil. Pushing the good old 5litres is the challenge that's why I love them, if I wanted an easy project I'd build an LS lol.

Thanks Geoff, I believe copper gaskets are used when you machine the block & install O'rings then machine a receiver groove into the head. I've removed the passenger head and found no issues with the Felpro gasket so I'm thinking its worse like broke rings on #2. Will post a video shorty.

that isnt a turbo thats a jet

Thanks mate 👍

Thanks mate!. It's running a Borgwarner SXE-372 controlled by twin hypergate 45s and eboost2.

@@com-mod9716 sick combo! I’d like to line it up with my v6 vs ute,turbo hidden under the tray,it’s still stockish but having said that I could write 5 pages of work I’ve done, here’s some 3.73 locker,2700 stall ,534 lift with 1.9 rockers, ported heads,arp,kb silvolites and l26 conrods,water to air,-8 non return fuel sys fuel cell with internal surge tank etc I used to rag on these 3.8’s nearly went Ls or 304 but built several versions of this till got one I like. ( it’s the one that never exploded at 25psi) lol. it does the trick.

@@needmoreboost6369 Sounds like a pretty serious Buick combo you've got there mate! What figures did it make? Would be awesome to line them up 😎!

@@com-mod9716 it’s the later motor mostly vy , it’s best street et so far was 12.05 at 215kmh 22psi boost on cheap cheese cutters but it’s only on 17psi now because the auto is dying but still 0-100 5sec flat, using an app it’s about 300-350hp on 15psi and 98ron, using speed calculator it’s et is about 300hp but mph the calculator says 540hp I believe the I phone app I accel is more accurate, it walks past a ve ss ute pretty easy