Whut up guys? I've been checking out this forum as of late and i've noticed that people here don't really ignore posts, that's nice to see since it's been quite hard getting help from SHO people without them telling me to use the search forum, which i do with no success.
Anyways, I got a 98 GS-R and I'm planning to get headwork done at DPR and I'd like to upgrade my internals also. I've been thinking about purchasing Skunk2 stuff.

1. If I want to rev to 9K RPM when all the work is done, are the cams going to be making power above my usual 8100 RPM redline? Is upping the redline going to do me no use with the cams?

2. If i do up the redline, will i need the retainers and valvesprings to accomodate it?

3. If i do need to get the springs, do i only need to get the inner springs, or the outer ones too?

4. Hoping that you guys are somewhat familiar with DPR's Stage V headwork http://www.dpr-racing.com/stages.htm , what kind of gains would you expect from the cams itself after the headwork, enlarged throttle body, and upping the compression to ~11:1 properly dyno tuned of course (with slunk2 cam gears).

5. After this work, is it suggested to get the skunk2 intake manifold for even more gains? What about tuning items, such as J&S safeguard or V-AFC or whatever else you guys recommend?

6. I'm looking to attain close to the 200 wheel horsepower mark, is it possibly with this skunk2 stuff?

7. Will my car still continue to consistently idle well and be smog legal (which i'd really like)?

8. Is this project gonna happen around $4K including headers/cat/exhaust?

I really appreciate you guys for taking your time out to answer my questions. Any additional advice you guys feel i should need to know would be helpful.

 

Anyone out there with any kind of advice?

 

I'll try to answer to the best of my abilities

1. If I want to rev to 9K RPM when all the work is done, are the cams going to be making power above my usual 8100 RPM redline? Is upping the redline going to do me no use with the cams?

It all depends on the cam, certain cams will make power to 9k and even past having your car dyno tuned can answer the question quickly.


2. If i do up the redline, will i need the retainers and valvesprings to accomodate it?

Yes, its always good to upgrade your stock valvetrain when upping your redline.


3. If i do need to get the springs, do i only need to get the inner springs, or the outer ones too?

See this one i'm not sure of.....anyone?


4. Hoping that you guys are somewhat familiar with DPR's Stage V headwork http://www.dpr-racing.com/stages.htm , what kind of gains would you expect from the cams itself after the headwork, enlarged throttle body, and upping the compression to ~11:1 properly dyno tuned of course (with slunk2 cam gears).

Not sure either...


5. After this work, is it suggested to get the skunk2 intake manifold for even more gains? What about tuning items, such as J&S safeguard or V-AFC or whatever else you guys recommend?

Yes i recommend getting the S2IM when upgrading to wilder cams than stock. J&S safegaurd wouldn't be needed, but the apexi v-afc or the fields vtec controller would be needed to fine tune your car. It also would be a good idea (assuming you haven't thought of this) to upgrade your exhaust system. And suspension.


6. I'm looking to attain close to the 200 wheel horsepower mark, is it possibly with this skunk2 stuff?

According to a few sources it is possible, but you will need a lot of tuning to attain this goal.


7. Will my car still continue to consistently idle well and be smog legal (which i'd really like)?

Yes, my friend has Skunk2's in his Integra and they sound and feel stock.


8. Is this project gonna happen around $4K including headers/cat/exhaust?

It all depends where you get your products from. But i would have to say no. Then again you have to be more specific on what exactly it is your buying.

Hope i helped some.

early round on me!

 

Hey, Whats up. I will help as much as possible.

1. If I want to rev to 9K RPM when all the work is done, are the cams going to be making power above my usual 8100 RPM redline? Is upping the redline going to do me no use with the cams?

A) Depending what cams you use will have different results. The skunk2 cams make power to 8500 I think. Maybe a little more.

2. If i do up the redline, will i need the retainers and valvesprings to accomodate it?

A) Yes. You will need the valve springs and retainers. According to skunk2 you will not. They say you can use the stock valvetrain.

3. 3. If i do need to get the springs, do i only need to get the inner springs, or the outer ones too?

A) When using higher lift, longer duration cams, you will want the inner and outer springs.

4. Hoping that you guys are somewhat familiar with DPR's Stage V headwork http://www.dpr-racing.com/stages.htm , what kind of gains would you expect from the cams itself after the headwork, enlarged throttle body, and upping the compression to ~11:1 properly dyno tuned of course (with slunk2 cam gears).

A) I have no idea abouit this. This will vary upon the quality of the headwork, what size TB you use, header you use and who does the dyno tune.

5. After this work, is it suggested to get the skunk2 intake manifold for even more gains? What about tuning items, such as J&S safeguard or V-AFC or whatever else you guys recommend?

A)The stock GSR manifold is a performance restriction. The cross section of the secondary runners are small and house butterflys that restrict air. Its a MUST to get this manifold and get it port matched with your TB. When you are trying to make power past the stock redline, this will help as the stock dual stage manifold sucks. You can get away with a V-AFC and an air-fuel ratio gauge. Shogun power tuner is the cheap way to raise the redline withouit ECU reprogramming. Im scrapping my V-AFC and going with electromotives TEC-II.

6. I'm looking to attain close to the 200 wheel horsepower mark, is it possibly with this skunk2 stuff?

A) In order to do this, you must have a header with a 2.5" collector. Otherwise this will be a bottle neck. But to answer your question, it should be possible with all that stuff.

7. Will my car still continue to consistently idle well and be smog legal (which i'd really like)?

A) Smog legal, not sure. Idle quality, Skunk2 syas like factory but when you incorporate cams and headwork might have a slight problem but should be able to get ironed out with some proper tuning.

8. Is this project gonna happen around $4K including headers/cat/exhaust?

A) Not looking good for this. With all that work, you will need alot of Dyno time which isnt cheap. Id say more around 5500-6000.


Mike

 

i agree with the above post

what type of cams do u have??
do u plan on having hi compression pistons??
what type of intake and headers do u have or plan to get??
u need lots of dyno tuning.
i would also recommend adj FPR too
u will also need ITR CAI since the s2IM sits lower than the GSR mani
o/w, i think ur goal is attainable if u do it right

 

Making 200hp to the wheels isn't hard at all!!! here is what you do:

1. headwork done by portflow
2. jun type 3 cams
3. jdm 4-1 headers
4. get rid of the 98 gsr ecu and get a obd1 95 gsr ecu
5. hondata
6. skunk2 intake manifold
7. erick's racing 70mm t.b.
8. skunk2 sprockets
9. full ignition system
10. Mill your head for higher compression without building the block

This setup will get you 200hp to the wheels easily. How do I know? My cousin is running this setup on his 2000 gsr and made 211 hp to the wheels tuned.....

 

first, don't expect an instantaneous respons at 1 or 2 in the morning...

0) what's your objective??? street power? drag? auto-x? dyno# bragging rights? if you commute and drag twice a year you may not want a powerband that runs from 6500-9000.

1) depends on which cams and cam gear settings

2) springs yes, retainers if you can afford it - especially over 8600-8800

3) the gsr has dual int and single exh vs. itr's dual/dual. a good budget trick is getting itr int springs and use the gsr int inners with the gsr exh to make a dual/dual setup. this should be ok with the CTR/ITR or skunks but not for serious stuff: jun 2s,3s or toda Bs, Cs.

4) realize that DPR is not the quickest, not the cheapest, maybe not the ultimate, but they have many many satisfied customers. if you want me to make up a number for dpr 11:1/skunk cams/TB/cam gears assuming i/h/e, non-jdm header, i can only offer 170-190whp.

5) getting to 200whp w/o the S2IM would be very hard and expensive - this is a must for your goal. i've had mine for only five days - i'm still blown away with the top end surge - very addictive. luckily no tickets yet. minimum, you want fuel pressure regulator. for 200 your gonna need V-AFC or tuned ECU (check out hondata stage 3 if you're gonna drag - this is what i'm saving for). the opening on the S2IM is 64mm. have someone port match if you go with a larger TB.

6) if you mean skunk cam/int man/gears, possible but not so easy w/o jdm 4-1 header - this is also probably a must for your goal.

7) you may not end up with an idle as perfect as stock when your engine's making that much power. sometimes making various adjustments to improve your idle will affect your total power - top end or area under the curve. fwiw, i do know of one person that was not happy with their idle after getting S2 cams but i don't know any other details. smog numbers may be there but depending on where you go and who you know, the visual inspection can be tough.

8) my rough estimate is $4500-5000 PLUS labor and dyno tuning.

other
determine your objective. be sure as you can now that you won't want to go FI a year from now. assuming you're not going to do this all at once, there are things you want to group together and things you want to think ahead on. for example the gsr intakes will not fit the S2IM, unless you have it modified (this is what i did with my AEM CAI). good luck. have fun. understand that hardcore NA is not cheap, and sometimes things break.

 

Thanks a lot guys, everything has been very helpful so far!
To answer a few of the questions that you guys posed:
1. As far as specifics on what i'm planning to get:
Headwork done at DPR (or you guys recommend someone else?), Slunk2 cams, skunk2 titanium retainers, skunk2 valvesprings, slunk2 cam gears, skunk2 intake manifold, stock throttle body overbored to 64mm, JDM ITR or JDM DC 4-1 header, some type less restricting cat (don't know any brands), and have a muffler shop bend me some pipes for my exhaust system, apex N1 muffler, V-AFC. I already own an AEM CAI fit for a GS-R.

If you guys could work out a $4000 budgeted all motor setup with close to 200 WHP that'd be great, i'm totally up for suggestions. I guess i chose the skunk2 products cuzz i't cheaper than other cams, but more expensive then JDM honda cams.

2. My objective of this car is a mainly a daily driven car with more ummph to it when i need to satisfy the urge to get a little kick out of driving. So basically, i'm into street power, but revving close to 9K RPM is tempting, although that doesn't exactly fit with "Street Power".

 

u are gonna need an ITR CAI and get rid of your GSR CAI. i would do everything else but get ITr cams instead.
what no pistons??

 

Well, with the headwork, maybe i'd replace the gasket with a thinner one to up the compression, but if you guys think it'd be better to upgrade the pistons instead, but i might do that. Why do you suggest ITR cams instead? Based on the specs, i don't think they are as aggressive are theY?
But if ITR would be better for me, then that'd be great cuzz they will fit into my budget much better.

 

I think it was a guy from atomic performance that stated that ITR cams are in some respects, the best street cams if you're not revving much higher than stock. ITR cams are good, but if you're going all out crazy, you'd probably want to rev higher and have more aggresive cams.

About the inner/outer spring issue. The GSR intake springs are the same part # as the ITR exhaust springs. (correct me if i'm wrong) So, you'd save a little money by having your intake springs swapped to the exhaust side.

 

I think almost everything else has been covered except the cat....
Random Technologies... They seem to be the best from what I've heard.
I've got one on the way right now, set me back $230 + shipping.