Low boost built motor?
#42
I talked to Corkey Bell and he said 12 psi is very dependable on a stock 1.6.
I'm not trying to be an ***. Just hear me out. Some things don't go together.
Everything has a balance. You are going over kill on somethings, and way under on others.
The well maintained stock na motor last over 200,000 miles. The big parts don't give out, the rings do. It will be the same on your special built motor too.
You should call Corkey Bell and listen to the setup he advises. If you want it dependable for that hp goal. Just put a Greddy kit on your stock motor.
The extra you are thinking of spending would buy several used motors. Or a used Ls1 Camero.
And your probably not going to keep that car 15 yrs anyways.
I'm not trying to be an ***. Just hear me out. Some things don't go together.
Everything has a balance. You are going over kill on somethings, and way under on others.
The well maintained stock na motor last over 200,000 miles. The big parts don't give out, the rings do. It will be the same on your special built motor too.
You should call Corkey Bell and listen to the setup he advises. If you want it dependable for that hp goal. Just put a Greddy kit on your stock motor.
The extra you are thinking of spending would buy several used motors. Or a used Ls1 Camero.
And your probably not going to keep that car 15 yrs anyways.
#43
I just don't get this guy, I think he is missinformed about how a turbo set up works. Someone local take for a ride in a well set up car and have him come to senses, beat him if you have to, I just can't listen to him asking the wrong question over and over, but at the same time I want to help him, but he won't listen.
Low comp+high boost=the win
high compression+low boost=good
low compression+low boost=ok, still slow and inefficient
high compression+high boost=disaster/failure/kaboooooom
Before you waste more money, look into proper management, a built motor is worthless if you are not gonna make use of it, ie. low boost. Why? It makes no freaking sense.
Low comp+high boost=the win
high compression+low boost=good
low compression+low boost=ok, still slow and inefficient
high compression+high boost=disaster/failure/kaboooooom
Before you waste more money, look into proper management, a built motor is worthless if you are not gonna make use of it, ie. low boost. Why? It makes no freaking sense.
#48
Hehe...
Alot is the answer. If you're unfamiliar search the forum for some threads on this subject.
On my 99 head I did some MAJOR unshrouding (not your typical unshrouding job), undercut valves, blended the bowls into the chambers and throat, reduced the short side radius, pollished the combustion chambers, removed any casting marks from the intake ports, and pollished the exhaust ports. When finished the car got so much more air that it was slower when I floored it because the stock ECU wasn't adding near enough fuel. Car would buck, backfire, and fall on its face. After Megasquirt it was ALOT quicker than stock.
Alot is the answer. If you're unfamiliar search the forum for some threads on this subject.
On my 99 head I did some MAJOR unshrouding (not your typical unshrouding job), undercut valves, blended the bowls into the chambers and throat, reduced the short side radius, pollished the combustion chambers, removed any casting marks from the intake ports, and pollished the exhaust ports. When finished the car got so much more air that it was slower when I floored it because the stock ECU wasn't adding near enough fuel. Car would buck, backfire, and fall on its face. After Megasquirt it was ALOT quicker than stock.
#49
I think this is backwards. For a street car, you want a smallish turbo that meets your power target, in order to get best response and low end.
Off boost torque gains from higher compression is 4% per point of compression ratio, but it doesn't help SPOOLUP. Turbo sizing is a huge factor in spoolup.
This will help spoolup AND off-boost torque.
.. Off boost response should be great with the higher compression
and better head,
#51
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This will make Zabac smile. I found the solution to my madness. Use stock engine, get new rings, get headwork done, upgrade to a standalone (Hydra) or parallel (MS) run like 12 psi, keep using my car as a work beater and get better fuel mileage than I do now cause I will have the power to properly tune it, and smile cause it's done.
#53
This will make Zabac smile. I found the solution to my madness. Use stock engine, get new rings, get headwork done, upgrade to a standalone (Hydra) or parallel (MS) run like 12 psi, keep using my car as a work beater and get better fuel mileage than I do now cause I will have the power to properly tune it, and smile cause it's done.
Amen brother...now you're talking!!! Proper management is key, the motor is very capable as is, your inability to tune it is what is holding you back right now.
At 12psi, don't waste your money on head work (unless you are doing it yourself and you know what you are doing), it will help, but at that power level there are better places to put your money. Head work becomes more important with bigger power goals as the benefits really start to show then, significantly.
If you will do anything to the motor (if you are planning a rebuild) just plan on some rods and rings and tri-coated stock pistons, you should be fine even at 300 whp then.
Good luck in your build...
#54
Headwork kinda always helps. With my wastegate full open, my car was as fast as a MSM, which I attribute to the headwork. 1 psi vs 8?
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
#55
Headwork kinda always helps. With my wastegate full open, my car was as fast as a MSM, which I attribute to the headwork. 1 psi vs 8?
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
Porting heads would be my last consern for your stated goals. You only need that if you are just going to race it out and have it undependable.
Having the head or even valve guides and seals redone for the engine rebuild may not be a bad idea.
You know your budget.
Good luck on the build.
#56
Headwork kinda always helps. With my wastegate full open, my car was as fast as a MSM, which I attribute to the headwork. 1 psi vs 8?
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
I think of it more as the gift that keeps on giving, the more you do the more good it does. 12 PSI on a modern motor is a healthy amount of power - hell, FM says you'll bend rods there, and to only run 9 (on their piggyback kit, admitedly)
But 225 whp on 12 psi is *entirely* reasonable, if not 250, on a '99 with headwork.
#59
Better flowing head = more air for less pressure = less boost = less heat soak = less backpressure, etc etc. While you're in there, put in some real springs (wish I had! I still might swap them, it's a pretty quick job.), and get a higher redline. All free power! :-P
I guess I'm saying I'd do that long before forged pistons. If the motor's out, and you can get cheap rods, that might be the place to put money.
Forced Induction
EMU
Intercooler
Injectors
Free-flow exhaust (though this can be added later)
Rods
Headwork (below rods because it can be done later)
BOV
water injection
Bigger valves, etc, if cheap headwork first time
upgrade downpipe
upgrade intake mani
upgrade turbo
pistons
Boring/Stroking
Somewhere along the line where you're upgrading stuff, it's time to at least concider a motorswap. :-)
I'm curious what other people think about this list, as far as the order for things. Bang for buck, that is.
I guess I'm saying I'd do that long before forged pistons. If the motor's out, and you can get cheap rods, that might be the place to put money.
Forced Induction
EMU
Intercooler
Injectors
Free-flow exhaust (though this can be added later)
Rods
Headwork (below rods because it can be done later)
BOV
water injection
Bigger valves, etc, if cheap headwork first time
upgrade downpipe
upgrade intake mani
upgrade turbo
pistons
Boring/Stroking
Somewhere along the line where you're upgrading stuff, it's time to at least concider a motorswap. :-)
I'm curious what other people think about this list, as far as the order for things. Bang for buck, that is.