i am building my gsr and my pistons are wiseco 11.8:1 with no milling or decking the block

also i have supertech valves and dual springs will the be able to handle these cams?

what retainers should i get?

what kind of compression do i need to get the most out of skunk2 pro2 cams?

i know alot can be done to the motor to raise compression

milling
decking
flat bottom valves
thinner head gasket


Modified by 1993gsrcivic at 3:46 AM 4/27/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993gsrcivic &raquo;</TD></TR><TR><TD CLASS="quote">
what kind of compression do i need to get the most out of skunk2 pro2 cams?

i know alot can be done to the motor to raise compression

milling
decking
flat bottom valves
thinner head gasket


Modified by 1993gsrcivic at 3:46 AM 4/27/2008</TD></TR></TABLE>


Seriously what you need is more displacement "to get the most out of those cams" with you current build. 84-85 mm bore would be a nice start or at the very least an LS crank. Compression won't save you here..

 

It is simply mind boggling that people think higher compression is the key to getting performance out of a cam. Never mind displacement, how well the head flows, selection of bolt-ons, tuning.... Nope, I'll get the head milled and flat faced valves for my 0.5 increase in static compression.....

 

weve actually loss power switching from a skunk2 stage 2 tuner series to a pro2 on our 1.8L gsr motor with ctr pistons. Displacment plays a big factor if ur using those cams.

 

i have a question instead of boring it to a 2.0 could you just stroke it to a 2.0?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote">i have a question instead of boring it to a 2.0 could you just stroke it to a 2.0?</TD></TR></TABLE>
im not sure if using a 92mm or a 95mm stroker crank on a 81mm bore would be consider a 2.0L , but if u have to use a 95mm stroker crank im sure it wouldn't be good for a daily driver.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote">i have a question instead of boring it to a 2.0 could you just stroke it to a 2.0?</TD></TR></TABLE>

You'd need a 95mm + stroke to be considered close to a 2.0L or roughly a 99mm stroke for a 2.0L. The problem would be the piston design which would have to be very flat to work in an 81mm bore with that stroke. You'd probably have to run a deck plate to make it all work. Sleeving and boring is probably the best and most reliable approach.

 

what about stroking it to a 1.89? im just wondering because i was gonna get the pro2s or the stage 3s for my b18cR. so these wouldnt be benificial? not trying to thread jack sorry.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote">what about stroking it to a 1.89? im just wondering because i was gonna get the pro2s or the stage 3s for my b18cR. so these wouldnt be benificial? not trying to thread jack sorry.</TD></TR></TABLE>

Easiest thing you can do is run an LS crank (89mm), that will get you close to the "1.89L". Pro 1's or the tuner stage 2 or 3 cams would still be better choices.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">


Seriously what you need is more displacement "to get the most out of those cams" with you current build. 84-85 mm bore would be a nice start or at the very least an LS crank. Compression won't save you here..</TD></TR></TABLE>

I've actually seen quite a few people claiming this. From everything I've read and the engine builders I've talked to, a larger displacement does not necessitate a larger cam. It does require a larger intake and exhaust, however the cam profile should not change. All you need to run a bigger cam is higher compression, and more air flow. Obviously I'm going to get torn to shreds for saying this, but here's someone else that agrees with me..

http://www.theoldone.com/archi...s.htm

 

You won't get torn to shreds but maybe some clarification is in order. Higher compression acts like larger displacement in that it compacts more air and fuel into a given space, therefore making more power. If he was building a 1.8L race engine that was going to run like 16:1 compression or something, then the pro 2's would probably work well. The problem is, if he's running a street engine, his compression is going to be somewhat limited by the fuel it uses and desired reliability/tuning requirements for driveability etc.

So if he want's to "get the most" out of his pro 2's on his street motor (which means keeping the compression reasonable) he'd need larger displacement.

 

so if i go with a brian crower 1.89 stroker and 12:1 cr. but even with this you saying stage 3s would be a better choice than pro2s? and yes this motor is gonna be street driven on 93 octane.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR &raquo;</TD></TR><TR><TD CLASS="quote">You won't get torn to shreds but maybe some clarification is in order. Higher compression acts like larger displacement in that it compacts more air and fuel into a given space, therefore making more power. If he was building a 1.8L race engine that was going to run like 16:1 compression or something, then the pro 2's would probably work well. The problem is, if he's running a street engine, his compression is going to be somewhat limited by the fuel it uses and desired reliability/tuning requirements for driveability etc.

So if he want's to "get the most" out of his pro 2's on his street motor (which means keeping the compression reasonable) he'd need larger displacement.</TD></TR></TABLE>

touche

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote">so if i go with a brian crower 1.89 stroker and 12:1 cr. but even with this you saying stage 3s would be a better choice than pro2s? and yes this motor is gonna be street driven on 93 octane.</TD></TR></TABLE>


This setup should work ok on pro 2's. What I'm saying is that they would work even better on more displacement. The statement is subjective I know but the best thing for you to do if you have the ability (money) is to buy and try a couple different cams and see which ones your build likes rather than find cams YOU like and try to build your motor around them.

 

I think the best choice for your setup, would be running skunk2 pro1+ , the 1.8cc with the 11.8 CR should be getting the true potential out of these cams.

 

i used them on the 12.1 compression on stock bore type r block and they pushed some good numbers 205+ 125+tq i seen 2.0 pushing 230+ it all depends what u do more to engine porting boring out etc.. putting just cams will not bring your hp up so much .

 

any aftermarket valvetrain will handle those cams... try and go for the titanium retainers tho i swear by skunk2 but its your choice

 

im using pro2's on a bored block .20 over and ls knifed crank. with 11:6:1

im guessing its a 1.9l

 

ok why dont you like s2? and what would you suggest? my plans are to get 260whp. and the more i read the more it seems like b series have a very hard time doing this on pump gas all motor. i love my b but im starting to want to buy a k for this project instead. here are my plans
brian crower 1.89 stroker bottom end 12:1 cr. and skunk2 stage 3s with s2 valve train. pnp, port match itr manifold with 70mm tb, bpi velocity stack. and there is a guy in houston gonna build me a header. do you think its possible to reach my goal? or should i just bite the bullet and go k even though i really dont want to.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote"> my plans are to get 260whp.</TD></TR></TABLE>

You will not get anywhere near this number unless you go with something like an 84-85mm bore and an 87.5- 89mm + stroke , from a B-series block, especially 1.8L. You have to go B20 or K series to hit the numbers you want but I'd argue there's still a big cost difference between the two.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Allmotor-R &raquo;</TD></TR><TR><TD CLASS="quote">i used them on the 12.1 compression on stock bore type r block and they pushed some good numbers 205+ 125+tq i seen 2.0 pushing 230+ it all depends what u do more to engine porting boring out etc.. putting just cams will not bring your hp up so much . </TD></TR></TABLE>

i can bet 100 bucks that the regular skunk stage 2 cam will make more power in ur 205hp 125tq motor

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18c5ej8 &raquo;</TD></TR><TR><TD CLASS="quote"> my plans are to get 260whp.</TD></TR></TABLE>

whoa! from a 1.8l? u need at least 150 shot of nitrous Express Yo!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1993gsrcivic &raquo;</TD></TR><TR><TD CLASS="quote">i am building my gsr and my pistons are wiseco 11.8:1 with no milling or decking the block

also i have supertech valves and dual springs will the be able to handle these cams?

what retainers should i get?

what kind of compression do i need to get the most out of skunk2 pro2 cams?

i know alot can be done to the motor to raise compression

milling
decking
flat bottom valves
thinner head gasket


Modified by 1993gsrcivic at 3:46 AM 4/27/2008</TD></TR></TABLE>


THOSE ARE GOOD PISTONS youll be good on 91 oct and the sk2 p2's are perfect!

i built the same setup in an eg all motor 225 whp 91 oct went 7.4 surprisingly!
here it is

http://youtube.com/watch?v=9gdzS8K2bwk

GL with your build!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeSpec &raquo;</TD></TR><TR><TD CLASS="quote">


THOSE ARE GOOD PISTONS youll be good on 91 oct and the sk2 p2's are perfect!

i built the same setup in an eg all motor 225 whp 91 oct went 7.4 surprisingly!
here it is
</TD></TR></TABLE>

No one said the pro 2's were not going to make good power, but the major issue is that the pro2's are more for a 2 Liter motor. In order to make adequate power with this cam, your displacement will be the biggest variable in your build. I believe the pro 1's will be suffice for a 1.8 with decent CR