I was wondering about how to go about a N/A build up of the LD9.
Presently I have many things I considering.
I know that if i want just basic Hp/Torque increases - then S/C is the best way to go.
But I'm actually considering things like building my 2000 Sunfire GT in the car it should have been from the factory. I kind of like the idea of a High Output N/A - a car that would be perfectly capable of holding it's own against other modern('06-'07) Sport Compacts.
I know some have stated using the 086 head. But I was also wondering if there's another Quad 4 head that nearly as good or even if the stock LD9 head could be P&P to flow as well.
My god what is up with all of the freaking N/A super builds lately? There are several N/A 2.4 builds going on right now. Search a little and you will be rewarded!
Thanks for the links - it helps.
Some I've seen - others I haven't - namely the N/A 2.4L Build.
It also sounds like the cheap way is to get a better flow head is to get a Quad 4 head from the auto salvage yard? Unless you can P&P your own head.
Also do all Quad 4 head increase CR by about 1.5-2.0 points?
kj1168 wrote:Also do all Quad 4 head increase CR by about 1.5-2.0 points?
yes
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"Youth in Asia"...I don't see anything wrong with that.
Also wondering does P&P lower the CR?
or does it raise the CR?
Or does it affect it at all?
I think building up a 2.4 with the 086 casting head is ownage.
P&P lets air flow better in and out the head. yes, It would affect actual CR higher just a bit.
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Dracula called, and he's coming tonight!
Not enough to matter. If you wanted to lower your CR get a thicker headgasket or dished pistons.
Also if I recall - using a Quad 4 head - like the 086, or 456 would practical eliminate the possibility of using the GM S/C, correct .
But from my understand, any of these heads would enable a N/A build up LD9 to could easily rival the GM S/C LD9, in power and preformance. Making the LD9 with a 11:1 CR & a 6800-7200 redline a true terror against the imports like Civic Si Type R, & Sentra SE-R Spec V.
I actually used a CR calculator to figure out the compression ratio with a Quad 4 head. If a stock LD9 (head is about 60 cc - correct?) has a CR of 9.7:1 like the 2000 model has - then according to the calculator with the 48 cc Quad 4 head bumps the CR to about 11.5-11.6 to 1.
i beleive the CR on a 2.4 with the 086 head comes to around11.5
Im a Xbox 360 fanboy...and damn proud of it!!
kj1168 wrote:Also if I recall - using a Quad 4 head - like the 086, or 456 would practical eliminate the possibility of using the GM S/C, correct .
But from my understand, any of these heads would enable a N/A build up LD9 to could easily rival the GM S/C LD9, in power and preformance. Making the LD9 with a 11:1 CR & a 6800-7200 redline a true terror against the imports like Civic Si Type R, & Sentra SE-R Spec V.
I actually used a CR calculator to figure out the compression ratio with a Quad 4 head. If a stock LD9 (head is about 60 cc - correct?) has a CR of 9.7:1 like the 2000 model has - then according to the calculator with the 48 cc Quad 4 head bumps the CR to about 11.5-11.6 to 1.
An LD9 with bolt ons rivals the Civic Si and Sentra SE-R Spec V. A built LD9 Rivals Stock SRT-4's and such.
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An LD9 with bolt ons rivals the Civic Si and Sentra SE-R Spec V.
So your saying a LD9 with bolt ons can make at least 165-170 WHP. That's about what the '06-07 Civic Si & Sentra SE-R Spec V are making. The '07 Civic Type R is rated at 225hp(at the flywheel), and is about as fast as Cobalt SS S/C.
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A built LD9 Rivals Stock SRT-4's and such.
So a built LD9 makes about 200+ WHP?
So a built LD9 makes about 200+ WHP?
It will once i get done with it! haha...
When I step on the gas, I want people to think the world is coming to an end! - Homer J. Simpson
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So your saying a LD9 with bolt ons can make at least 165-170 WHP.
if im not mistaken there not far from that stock i think there around 155 from the factory
boost is like ice cream, there's always room for it
cavalierkid02 wrote:Quote:
So your saying a LD9 with bolt ons can make at least 165-170 WHP.
if im not mistaken there not far from that stock i think there around 155 from the factory
That is at the flywheel.
06' Civic SI = 197 fwhp = ~168 whp
96-02 LD9 = 150 fwhp = ~128 whp
Not even marginally close
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"Youth in Asia"...I don't see anything wrong with that.
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That is at the flywheel.
06' Civic SI = 197 fwhp = ~168 whp
96-02 LD9 = 150 fwhp = ~128 whp
haha, stock LD9 is only 20 more WHP then my 2.2ohv. in a sence it's saddening. but then again with the 086 head i'm getting, 9:1 pistons (final will be roughly 10.7:1), secret cams, and bolt ons......200WHP sounds delicious... and very close....only about a month or so left before my build is done....only thing keeping me back is debt
I have seen stock ld9s hit 135hp-140hp.
Also i don't see porting causing any lowering Cr unless your removing material from the chamber.
You might see 200 hp but in all reality a bump in comp and secret cams is really not a whole lot. But you should see 200hp
Good luck with your build.
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haha, stock LD9 is only 20 more WHP then my 2.2ohv. in a sence it's saddening.
Well since we're talking WHP here . My understanding with a 15-20% loss from the crank to the wheels the 2.2 ohv would be about 100 whp.
The LD9 (2.4 TC) is about roughly 128-133whp. So that's about close to 30 WHP, or about 35 hp at the flywheel.
Still the LD9 makes about at least 35-40 WHP(about 45hp at the crank) less than the '06 Civic Si, or the '07 Sentra Spec V.
And that's alot of ground to make up with Bolt-ons alone. Maybe with 4-1 headers, hi-perf Cat, good catback exhaust, short ram intake, p&p TB, Performance Intake manifold, and ECM reflash you may be in the ball park
Even with bolt ons making 45whp is gonna be pushing it i mean maybe 5 hap for every mod full exhaust 5 hp mani t/b intake 5hp reflash maybe pick up 10 or so that's still only about 20-25hp.
Any ways back to the N/A build stuff 200hp is a good whp to shoot for and you still going to be spending a decent amount of money to get there N/A. I just spent about $6000-$6500 total for trans build and N/A engine build and iam still only shooting for 200-250whp would be nice to see more but that will just be bonus.
Hmmmm.....
My Bimmer would be barely beat by Pauls N/A cav back in the day. He had all the bolt ons. No cams or anything. My Bimmer has beat a Nissan Sentra Spec V from a dig and tons of rolls. Therefore I just assumed that Pauls car would beat the Sentra. Not a whole lot of rocket science there. All the cars run a low 15 or maybe a high 14. Nothing special between those cars. I would not consider it a great feat to beat any of them. Nothing on this site gets more action then bench racing. I find it funny.
Ok - so how is this for a possible build up plan.
Stage 1: 4-1 Headers &Catback Exhaust, Intake(which I have), enlarged TB, & pulley would be good for starters
Stage 2: Quad 4 head (prefer 086), with HO cams, Quad 4 Intake manifold, performance injectors, fuel pump, fuel filter & ECM Reflash
What do you all think of the plan so far?
And What is the approximate WHP rating at the end of Stage 1 & Stage 2
question: quad 4 head + ho cams on stock bottem end ld9 = ruined valves ? correct?
