big bore noob, stupid question alert Options

[stateofidleness]

so i have a dumb question.. i have my engine torn down to the heads and case and was my cylinders (i think) are kinda rusty (the little fins on it)

if i wanted to get a new cylinder/piston kit yada yada... can i get a "big bore" 96mm kit?

I didn't know if going with the big kit would require any modifying of the heads or case or something.. or if it would "bolt up" just like the stock parts.

pardon the noobness (IMG:style_emoticons/default/smile.gif)

[McMark]

Need... more... info...

Motor size? Complete teardown? Cam swap?

But, yes, you can put a 96 on any setup and build either a 1911 (1.7/1.8 based) or 2056 (2.0 based). 1.7 heads will need some work to fit.

i have my engine torn down to the heads and case and was my cylinders are kinda rusty

(IMG:style_emoticons/default/confused24.gif) Anyone speak Texan?

(IMG:style_emoticons/default/av-943.gif) Just givin' you a hard time. (IMG:style_emoticons/default/beerchug.gif)

[rick 918-S]

No stupid questions. Nice to see someone working on something.

[pete914]

What's the HP increase seen moving to the 96 mm cylinders on a 1.8?

[VaccaRabite]

100 - 125, depending on exhaust and fuel induction.

Zach

[Cap'n Krusty]

No stupid questions. Nice to see someone working on something.

"No stupid questions"? I beg to differ with you. A "stupid question" starts out as a normal question, but becomes stupid when the asker of the question decides he/she doesn't like the correct answer and shops it around until he/she gets the answer he/she wants. THAT'S a "stupid question".

The question asked here doesn't meet that definition. The Cap'n

[Cap'n Krusty]

100 - 125, depending on exhaust and fuel induction.

Zach

And cam and compression and valve size and head massaging ....................... The Cap'n

[arvcube]

But, yes, you can put a 96 on any setup and build either a 1911 (1.7/1.8 based) or 2056 (2.0 based). 1.7 heads will need some work to fit.

So does this mean that nothing needs to be done to stock 1.8 and 2.0 heads when using 96mm pistons/cylinders? they'll bolt right up?

[McMark]

Yup.

[stateofidleness]

haha my texan speak... threw an extra "was" in there.. got excited! lol
it's a stock 2.0 with no upgrades or changes like cam or anything.

but i saw the 96mm cylinders and thought, if theyre gonna get replaced, why not "upgrade" a little?+

how hard is it to install the stuff in the kit?: pistons, cylinders, rings, wrist pins, and circlips

any special tools required.. keep in mind im learning this stuff as i go so it takes me longer to do stuff but if it doesnt require
some special tools or knowledge, i can do it!

[VaccaRabite]

Can your current cylinders get cleaned up and bored out? Thats what I did with my 96s, and they turned out GREAT, were less expensive then the new ones, and had better quality many of the kits are reported to have.

For pistons I got some Keith Blacks from Jake.

Zach

[Cevan]

So if I took my '75 L-Jet 1.8 with 56K miles and had the cylinders bored out to 96 mm, bought some 96mm pistons from Jake (or other reputable source) and continued to use my 73'/74' SSI HEs and Bursch exhaust, what kind of hp increase could I expect?

Seems like it may be a fairly cost effective way to gain some torque/power. (IMG:style_emoticons/default/idea.gif)

[stateofidleness]

was thinking that but i don't know anything about taking stuff to a machine shop or where to go to get somethin like that done...

i figured a new set would be clean and already bored (IMG:style_emoticons/default/smile.gif) lol
i like new stuff... i know, i know...

so how hard is install?

im scared if i take my engine apart, it wont go back together lol

oh yea, would a complete gasket kit come with the gaskets needed as well?

[SirAndy]

So if I took my '75 L-Jet 1.8 with 56K miles and had the cylinders bored out to 96 mm, bought some 96mm pistons from Jake (or other reputable source) and continued to use my 73'/74' SSI HEs and Bursch exhaust, what kind of hp increase could I expect?

Seems like it may be a fairly cost effective way to gain some torque/power. (IMG:style_emoticons/default/idea.gif)

i would guess around 10 HP ...

let's assume you're currently somewhere around 80 HP, a 10 HP increase is 12.5% more power!
(IMG:style_emoticons/default/shades.gif) Andy

[stateofidleness]

so i can get the 96mm kit for $200 shipped? should i jump on it?

going with a buddy of mine tomorrow to a local 914 mechanic.. says i should go ahead and get the heads cleaned and bored (whats this cost?)

if i took my engine to the mechanic and told him to do the heads and to install the cylinder kit, what would that cost roughly?

also, i was asked if the valves would need to be changed (larger?)

sorry for all the questions, i just wanna do this right!

[r_towle]

So if I took my '75 L-Jet 1.8 with 56K miles and had the cylinders bored out to 96 mm, bought some 96mm pistons from Jake (or other reputable source) and continued to use my 73'/74' SSI HEs and Bursch exhaust, what kind of hp increase could I expect?

Seems like it may be a fairly cost effective way to gain some torque/power. (IMG:style_emoticons/default/idea.gif)

i would guess around 10 HP ...

let's assume you're currently somewhere around 80 HP, a 10 HP increase is 12.5% more power!
(IMG:style_emoticons/default/shades.gif) Andy

Higher CR would result in probably 20hp.
So you stand at 100hp
With a new cam and head work, you can squeeze an additional 20-30 hp out of it.
It will also run cooler with the new cam.

Rich

[MartyYeoman]

Do it.

[Cevan]

So if I took my '75 L-Jet 1.8 with 56K miles and had the cylinders bored out to 96 mm, bought some 96mm pistons from Jake (or other reputable source) and continued to use my 73'/74' SSI HEs and Bursch exhaust, what kind of hp increase could I expect?

Seems like it may be a fairly cost effective way to gain some torque/power. (IMG:style_emoticons/default/idea.gif)

i would guess around 10 HP ...

let's assume you're currently somewhere around 80 HP, a 10 HP increase is 12.5% more power!
(IMG:style_emoticons/default/shades.gif) Andy

Higher CR would result in probably 20hp.
So you stand at 100hp
With a new cam and head work, you can squeeze an additional 20-30 hp out of it.
It will also run cooler with the new cam.

Rich

What would need to be done to the heads and how much could I expect to spend for that?

Just changing the P/Cs is something I could accomplish over the course of 3-4 weeks. I may be able to get the cylinders bored for free so it would be a 10-20 hp gain for less than $300. That's $15-30 per hp.

A 30-50hp gain would be fantastic but it would likely be another winter project (and I'm not doing one of those next winter), likely cost at least $1500-2000, and may be beyond my capabilities. I could do the P/C this winter and then the cam and heads the following winter.

[type47]

so i can get the 96mm kit for $200 shipped?

going with a buddy of mine tomorrow to a local 914 mechanic.. says i should go ahead and get the heads cleaned and bored (whats this cost?)

if i took my engine to the mechanic and told him to do the heads and to install the cylinder kit, what would that cost roughly?

also, i was asked if the valves would need to be changed (larger?)

you get what you pay for. search for quality comments on the set of p&c

to clean heads should not cost too much. i think they just dip them so....50 $? (@$80/hr)

never heard of "boring" heads. i have heard of flycutting heads which cleans up the seating surface between the heads and the tops of the cylinders. if boring the heads means enlarging the openings in the heads where the cylinders fit, i don't think this is necessary for a 1.8 or a 2.0 head, it is necessary for a 1.7.

since the engine is out of the car, to do the heads and install the p&c set would take (really a wild guess): 6-8 hours (@$80/hr shop labor rate) $6-700. this is where you should do it yourself if you want to keep the costs down. it is not complicated or difficult to install p&c's. if you're going to buy a $200 set of p&c's, then you should install them yourself.

alot more work would be required to enlarge the valves (need to install larger seats). i'm not sure there will be a significant increase in hp for larger valves so that might not be very cost effective. depending on the condition of the valves, you may need to change the valves.

[Mark Henry]

You will not get that kind of power increase from just jugs. You may get 2-4hp...maybe. Bumping up the CR on a stock l-jet will start to mess with the FI.

Cam, then exhaust, is your biggest bang for the buck.

To get 120-130hp out of a 1.8 we're talking dual carbs, heads, cam, jugs, exhaust, etc…