checking out an 86 mk3 tomorrow

[cvbikeguy]

hey Cre,

do you know alot about timing? i was told i should time my vehicle for my driving style while its in this stage. is there a way to do that without getting adjustable cams?

[cre]

Originally Posted by cvbikeguy

hey Cre,

do you know alot about timing? i was told i should time my vehicle for my driving style while its in this stage. is there a way to do that without getting adjustable cams?

Well, you could get custom cams built.... lol... other than that, no, adjustable gears are it and they're somewhat of waste on a N/A, IMO.

Yeah, that freeze plug sure wasn't helping.... I'm surprised you never saw any coolant leaking.


600+ HP on a stock HG?! That'd be the day... well, maybe it'd last for 2, but that's about it. I wouldn't trust the stock HG for more than about 350RWHP... not if I wanted it to last (and that's pushing it as far as I'm concerned).

Block and HG measurements are here:
http://www.supramania.com/forums/sho...sket+thickness
As you don't know what's been previously taken off the block and head your machinist will need to measure both and you'll need to select a suitable head gasket after.

NOTE: Composite (OEM) head gaskets are NOT reusable!!!!

[cvbikeguy]

oh man... so we got to the machine shop and it turns out that the head is too warped and they cant shave any more off of the head. soooooo

i need a new head. found one on ebay for $400 but thats the cheapest i have found.

and the build goes on....

[cvbikeguy]

ahhh cre you have convinced me to go MHG. im gonna get the HKS one. i talked to the shop and let him know, he said he just did a supra motor before mine and hes the best shop in town. thing better be smooth.

he said hes also going to bore out the cylinders more for higher compression
(since they are f'ed up anyways). im really tring to make sure i dont miss any mods that i could be doing at this stage since everything is taken apart, i just wish i had more money. i think the MHG is good too in case i do the turbo conversion later. but im seeing keeping it N/A as a challenge. believe it or not when i first got the car i only wanted a turbo and to hear the BOV. lol

[cre]

Careful... you have to have a PERFECT head and block deck for the HKS Stopper or it WILL blow! My recommendation would be the Cometic, still needs a VERY smooth surface but it is much more forgiving.

As for raising the compression ratio... it's a waste of money. There's almost no power to be had from it even if you bore it as far as is physically possible. Personally, I'd go for a lower CR and start working on a build which could support a turbo.... it's up to you though.

Originally Posted by cvbikeguy

(since they are f'ed up anyways). im really tring to make sure i dont miss any mods that i could be doing at this stage since everything is taken apart, i just wish i had more money. i think the MHG is good too in case i do the turbo conversion later. but im seeing keeping it N/A as a challenge. believe it or not when i first got the car i only wanted a turbo and to hear the BOV. lol

I don't think you're planning this out as well as you think you are.... just because a MHG is reusable doesn't mean it will work fine on another engine... the other engine may need a thinner or thicker gasket.

If you're planning on turboing this engine you need to do research into mods which will benefit the forced induction setup. If you are looking to go for an all-motor build (no turbo, no supercharger, etc.) than you need to plan your mods accordingly there too... there aren't a whole lot of internal engine mods which work well in BOTH situations other than forged internals (but you still need to pick because you'll need different pistons for each application), head porting and valve job and (argueably) custom cams.... but in the best situation you buy cams depending on the build.

I do not recomment all-motor builds on the 7M-GE.... I know a few people who have spent an absolute fortune on their N/As to not even break 300HP at the wheels. They're not novices either and we're not talking stock-ish build... I'm talking completely custom cams and crankshafts, all forged internals, stupid high compression ratios, port and polish jobs, larger valves... the 7M is a GREAT engine for forced induction... it's miserable as a N/A; A fact which I finally accepted about two years ago.

For the replacement head check out local salvage yards where you pull it yourself.... around here they charge $25 to $50 for a complete head... even if you go through 3 duds before buying a good one you're still coming out on top as opposed to what you're likely to pay on Craigslist or Ebay.

[cvbikeguy]

Careful... you have to have a PERFECT head and block deck for the HKS Stopper or it WILL blow! My recommendation would be the Cometic, still needs a VERY smooth surface but it is much more forgiving.

*researching* yea i see they have had some good reviews, thanks Cre. yea after all of this id rather be safe than sorry.

If you're planning on turboing this engine you need to do research into mods which will benefit the forced induction setup. If you are looking to go for an all-motor build (no turbo, no supercharger, etc.) than you need to plan your mods accordingly there too... there aren't a whole lot of internal engine mods which work well in BOTH situations other than forged internals (but you still need to pick because you'll need different pistons for each application), head porting and valve job and (argueably) custom cams.... but in the best situation you buy cams depending on the build.

man i hate being a newb. i guess there is a reason why most people has a tubo'd 7m.

I do not recomment all-motor builds on the 7M-GE.... I know a few people who have spent an absolute fortune on their N/As to not even break 300HP at the wheels. They're not novices either and we're not talking stock-ish build... I'm talking completely custom cams and crankshafts, all forged internals, stupid high compression ratios, port and polish jobs, larger valves... the 7M is a GREAT engine for forced induction... it's miserable as a N/A; A fact which I finally accepted about two years ago.

im totally open to all advice. especially in the key state my engine is in (torn apart) bust since i am going with the rebuild, wont turboing the engine add on another $1G on this build? if not then im not totally opposed to it. honestly id rather turbo this engine now that i know the ins and outs of it. i know that its reliable especially with the metal head gasket, arp botls, new lines and all.

For the replacement head check out local salvage yards where you pull it yourself.... around here they charge $25 to $50 for a complete head... even if you go through 3 duds before buying a good one you're still coming out on top as opposed to what you're likely to pay on Craigslist or Ebay.

none of the reliable shops have any its all good. id rather be safe. sadly all the places here are extremely ghetto.

BTW Cre thanks for pretty much guiding me in this build. ive search like a mother but theres still alot i need to learn.

[cvbikeguy]

as im finishing your reply i found this post

http://sfbay.craigslist.org/eby/pts/1492687460.html