Ok guys, im pulling the stroker back out in july after my last big car show..and with alot of help from Cavfan1 i hope to make her bigger and better!! but id like to get your guys opinions along the way. so far the BIGGEST plans for it is to up the compression closer to 12:1 and swap out my w41 cams for a new set of HG2 cams.
until the engine gets pulled i will be workin on a new head ..086,SSvalves,bronze guides,5 angle valve job and a nice polish job...wont be porting it much but focusing more on just polishing the ports.
also looking into getting my HO manifold extrude honed this time around.
so any opinions or suggestions are welcome at this point. i dont want to overlook anything
sounds like you've basically got everything worked out man...
i hope you already have a set of hg2's bought because ron ran out of blanks recently
so unless i missed something and he located some more you'll need to find a set someone else already bought. definitely try and find some of those nhra springs or something in the like. titanium retainers as well...
i would think since you'll be getting new pistons you'll also be getting new rings, yes? if not i would definitely be buying new. also... i say you bore it out even more. something like .050 over. just for some more cubic inch... clean everything up. including the block, have it hot tanked and gone through to be checked. align honed if necessary. new bearings throughout to!
unless your planning on just decking the head for your compression upping????
if you already dont have ss valves remember getting these are going to up compression as well because they have less of a dish than stock. sivalves.com sells the guides AND the valves. just go through them for everything. didnt you have an issue with bronze guides once? ive been meaning to ask you about that...
TUNE TUNE TUNE!!! i wanna see this bastard hit at least 230whp.
Edited 2 time(s). Last edited Friday, May 08, 2009 11:10 AM
I'm tired of wasting my time... now I'm breakin' free.
going with new pistons for the higher compression..already have ss valves yes,but this new head will get a fresh set. i WILL be boring it out more...question is...just how much is really to much ? always thought .040 was the "safe limit"
the safe amount is entirely different from engine to engine... There should be a spec somewhere for "minimum cylinder wall thickness", which you'd want to stay away from. For instance, you can bore SBC's out a lot more than you can most 4 cylinders... I'm not sure what HG2's are, but I'd imagine your best bet for a build like this would be to call up a cam company and have them figure out what spec would work best with what you've got for what you want it to do. Their techs can be quite brilliant with stuff like that, and a cam catered to your engine will typically have much better results than something "off the shelf".
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
scott (section8cav) wrote:Ok guys, im pulling the stroker back out in july after my last big car show..and with alot of help from Cavfan1 i hope to make her bigger and better!! but id like to get your guys opinions along the way. so far the BIGGEST plans for it is to up the compression closer to 12:1 and swap out my w41 cams for a new set of HG2 cams.
until the engine gets pulled i will be workin on a new head ..086,SSvalves,bronze guides,5 angle valve job and a nice polish job...wont be porting it much but focusing more on just polishing the ports.
also looking into getting my HO manifold extrude honed this time around.
so any opinions or suggestions are welcome at this point. i dont want to overlook anything
+/- 4 degree cam gears
knife edge crank if staying NA
Have you looked into engine coatings??? It is something I want to do on my current build
Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi
LG0/LD9 for Life
Yea Cavfan's been showing me the coatings..definetly will do the pistons..still considering others
Where did you get the SS Valves, and guides ? (for the 086).. If you do not mind me asking.. I thought Mantapart was gone ?
My Cav
I give up...
i'm buying a VW those people love trees, so they should love eachother too... "Andy"
Short Hand wrote:Where did you get the SS Valves, and guides ? (for the 086).. If you do not mind me asking.. I thought Mantapart was gone ?
SS valves and bronze valve guides can be purchased through Karo (that's where i got mine) and NHRA springs for the 086 head you can get through Ron Seibenick on quad4forums.com (again, that's where i got mine. They're meant to rev to 8,000- 8,500 RPM and take up to 430 lift) W41's are pussy now-a-days lol. HG2 cams ( Hot Grind 2) are 223 duration, 430 lift
Hey Zyaaaa...i got a sucker punch of a surprise for my build thread in a couple days....you can eat your heart out then lol
Short Hand wrote:Where did you get the SS Valves, and guides ? (for the 086).. If you do not mind me asking.. I thought Mantapart was gone ?
You can get SS valves and bronze guides from Si Valves. ( maybe the same place Karo gets them ).
DESCRIPTION
LENGTH PART NUMBER
1.181 Olds Quad 4 Exh STOCK SEV-2020
1.400 Olds Quad 4 Int STOCK SEV-2021
1.440 Olds Quad 4 Int STOCK SEV-2025
1.250 Olds Quad 4 Exh STOCK SEV-2026
Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi
LG0/LD9 for Life
go higher than 12:1 and run e85 for fuel.
Can we use 12:1 pistons on 93 pump gas??
Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi
LG0/LD9 for Life
i think thats why he suggested e85 ..however im STILL not sure what is really NEEDED to run e85..if anyone ever gets the FACTS straight on it ill try it.
What happened to your engine, I remember seeing a dyno video of your car?
a couple things werent the way i wanted....i want more compression, my rings failed leak down tests,my valve guides are passing oil , and the pnp work the guy did wasnt quite the way i wanted....all that and i STILL put down 209..so with the new plans and doint things RIGHT im hoping for a bit more power.
UPDATE ... just brought home a new 086 head from the junkyard...45bucks whooohoo
Sooo does this mean your going to sell off the old stroker pistons after tear down? Good luck on the new build up ill be paying attention. I remeber reading somewhere about how much you could bore out a 2.3 bore. I cant for the life of me remeber where though.
yes, the pistons will be for sale...dont know who could use them though
im less worried about the bore and more concerned with what the ACTUAL compression of an 086 head on a 2.4....did anyone ever get real numbers?
Blwn LD9 wrote:Can we use 12:1 pistons on 93 pump gas??
Yes, and @!#$ E85 crap.
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Taetsch Z-24 wrote:Blwn LD9 wrote:Can we use 12:1 pistons on 93 pump gas??
Yes, and @!#$ E85 crap.
Chris
lol. last i recall gm uses E85 on a lot of their builds esp when using high compression. you having such a firm grasp on gm's nuts id assume you would know this and see the benefits? no?
as to what is needed to run E85 all you need is bigger injectors. there is already 10% ethanol in most if not all grades of fuel here in the US, all cars are built with a fuel system that is capable to resist being ate away by it. the local dyno shop i live by has a lot of guys run E85 on their builds because the benefits are amazing. cars are putting down power that usually is only capable when running race gas, race gas isnt even economical because you cant find it anywhere. all the guys in MN love E85.
what do you mean you dont know who'd be able to use your pistons? someone wanting to copy your build? lol
man.. i hope that 086 u bought is good. you shoulda talked to raf... he's got the hookup on a BRAND new 086. never been bolted on. not to badly priced either. and idk if you ever saw his but the exhaust side was cnc milled and looks completely different than a stocker. looks like it was ported on a cnc machine actually. id say all you'd need to do with that head is a knife edging and mirror polish and it would be a sweet freaking piece to have.
anyways.. do u already have hg2's?
I'm tired of wasting my time... now I'm breakin' free.
no, unfortunetly i am unable to get any at the moment ..as you probably know...so ill be keeping an eye out all summer for a set.
as for the head it looks pretty good...i dont see any cracks, im having it dipped and inspected before i start polishing it....the yard gave me a week warranty on it so i need to work fast to make sure its ok....
and i didnt know he could get NEW 086 heads? whats the price? its gonna be hard to beat 45 bucks lol i gotta build this on a budget this time around...thats whats gonna take me so long
Ill be interested in those pistons depending on how my wallet is once the time comes...im thinking im going to have a 2.4 block resleaved with 2.3 sleaves to avoid the crank timing issues. I want a torque monster for my vert lol. Rafs head does look sweet but I feel you on the building with a budget.
im confused...ive never seen a 2.4 OR 2.3 with sleeves.
When you have an engine that has been damaged or bored out too much they can actually put new cylinders in the block. my machinist said this was called resleaving. Basically instead of grinding the 2.3 block for the 2.4 crank and getting a reluctor wheel ill be getting 2.3 cylinders put in the 2.4 block.
ok cool, that makes sense.
but you dont need to do any grinding on the block..nor do you need a reluctor wheel. you just need to drill a hole in the block above the oil filter to install a new cps. thats all thats done on Mine anyway...when i break it down ill take pics for everyone...i have a few now but not as many as i should
Here are a few things to consider when using e85/e98 ethanol gas. Portland Speed Industries recently did a bunch of R&D using this fuel on their R34 '99 Skyline GT-R. According to them, "we've seen 6 to 7 percent more power out of ethanol compared to race gas because ethanol cools the intake charge more effectively, lettings us get more aggressive with the ignition timing and air/fuel ratio. But because ethanol requires about 30 percent more fuel flow, we had to build a custom twin-capacity fuel system including twin in-tank fuel pumps flowing through -10 lines to a Sard fuel rail and 1600cc injectors."
At the time the article was written, they had not had a chance to re-dyno the car for e98 from premium street gas. However, they were expecting to get another 25whp from the setup.
Info was copied from Modified Magazine, June 2009 edition.
On a side note, pure ethanol in motors is still highly corrosive. It causes the internal engine seals to deteriorate much faster than its gas/race fuel equivalents. Not to mention the higher demand on the fuel system and corrosion in the fuel lines.
I just happened to read this article a few days ago and thought that it would be relevant to this discussion, if you were looking to convert to e85.
