Looking for advice on my upcoming build
I presently have a LS1 with ported Dart heads at 10.9cr and a 224/224 - 571/571 cam and all the mods. I'm running a P1SC1 at 10.5-11psi and making 702rwhp at 6100rpm. It's an A4 with 3500 stall

I am building a forged LS1 with 10.5cr with the Dart heads.

Goal - I want a streetable car that will spend 90% of it's time cruising including short trips, so I want great off idle torque and drivability. I also would like to get in the 800rwhp range.

Question - Will I see enough benefit to make it worth it if I swap to a FI cam (looking at something like the Jam Cam or something simular from Tick performance) or should I save the $$ and concentrate on updating the intercoolers or eventually swap to a D1 or F1 when $$ is available?

Thanks guys

 

IMO save money and swap to D1 or update intercoolers if you are running hot now etc.

You will see more HP out of a bigger head unit.

Pushing 700 on a P1Sc is pretty stout!

700 on a D1 would require less boost and would be more efficient


You can always get your P1Sc rebuilt to D1 specs etc.

Bob at Brute speed can help with that. It's not cheap but can be done as an option

http://shop.brutespeed.com/ProCharge...rades_c493.htm

 

That's what I'm trying to get straight answers on

No one seems to be able to tell me what type of gains I will get from going to a larger cam, compared to going to a D1 or F1?
Cam and springs - $800
Upgrade to D1 - $1400


I am considering a cam, because there will be NO better time to install than when I have a bare block sitting on a stand instead of buried in a car. BUT..... If Im only going to pick up 15-25 hp with a larger cam but run out of steam on the P1SC-1, It would seem a more logical choice to go with a D1 and then maybe try the larger intercoolers in the future.
Not wanting to skimp here, but want the best bang for my buck, and REALLY don't want to waste $$$
NOTE; Heat is no problem with dual meth keeping temps around 70* on a 90+ degree day

 

I'd vote to go with better blower, intercooler, and ramp up the meth. the boost will buy you a bit more than the cam. if you are happy with the streetability, ramp up the boost. you need to get LOTS of intercooling and meth running with the high CR, but since you are mostly street driving and want the rapid throttle response, that's the way I'd go.

advantages of the cam would be to bleed off a bit of cyl pressure at lower rpms to keep it out of detonation until the meth kicks in.

if you don't have that problem now, and are happy with the responsiveness of the cam I'd keep it.

800 hp is alot of jam and you want to stay within the range of the blower efficiency to get there! it's more expensive than a cam swap, but it will get you to where you want to be.

 

702 with a P1sc through an auto is pretty stout. What is your current [pulley setup?
No contest, do the blower and intercooler.

 

if you do anything... I would not do it for a number... reason being is at 700 on a p1.. that thing gets out quick.. you try to make 800 on D1.. it might feel slower on the bottom end.

Cam is a Cam when a blower is concerned. Will you make a little more.. probably... will it be worth $1k.. no

Do you have a dual inter coolers or one? if dual, get single.. if not.. stay with what you got.. since you use meth.. inter coolers are really a waste of money anyways...

D1 upgrade.. again.. if you set it up right..it will be better.. but you are going to have to over spin it or max it out to see the pep out of it that you do with the P1sc1.. but if you do it, don't be surprised if you make more than 800 with that setup..

 

Thanks guys; It's great to get some usable feedback.

I am ONLY updating because I can't enjoy it with the stock bottom end. I am "fairly" happy with the power, but know it's going to break.
Im not really going specifically for "800", I just know that if I spend $4000 for a forged bottom end, I want to make more than I make now!!! (yes, greedy)

I run a 3.6" now and see 10.5 - 11psi at 6100 (my max on stock bolts) I have a custom 4" charge tube and huge filter pulling outside air. I am running the duals and love the setup if I can make some decent power with them. Not worried about the cooling, just don't want to restrict the flow.

Ive got a dual nozzle meth setup, and am running a meth dependant tune keeping it rich (11.3 or less to protect the pistons)

With 10.9cr., 17* timing, and a 3500 stall, it blows the RA 335's off pretty well from anything less than 40. I love the low end drivability, just want to be able to beat any of the modded cobra's etc

BOTTOM LINE - If I keep my present set up on a forged 10.5 bottom end, and swap down to say a 3.0 pulley with the HOPES of getting to around 14-15 psi, and rev to 6600, what kind of #s can I reach??

Thanks guys

 

Don't think its going to blow because that's just the way it is.. a few of us have gone past that and done it for years.. stock is fine with the right tune. I would worry more about the trans if it was me.. haha

 

Im not as lucky as most guys; It will blow with these weak 98 rod bolts, and at the worst time for me
I have a stage V RPM trans so I should be good there

How would a F1R compare to a D1?

 

you would feel slower on the street, plus your motor is really to small for it.. its take alot to turn the blower. F1r is really a race blower. F1a when done right is too much for the street.. D1.. just right on full kill..

 

i had a D1 with twin I/C on a forged ls2 in a automatic and only made 704 to the wheels and thought that was slow for my setup I felt like i should have been around 800 to 825rwhp but thats my crappy luck

Rick

 

Thanks; Had an offer on a F1 but not wanting to get crazy

What do you think my max power will be with my little P1 maxed out, and a D1 maxed out with everything else the same?

Thanks for he help.
I want to get my plan together then start hunting deals.

 

So this is where Im at right now, thanks to a lot of input;
Going to build the 10.5 forged short block, and put my P1SC1 (which Im told is BETWEEN the P1SC and D1) with a 3.1 pulley, which is just beyond max rpm for the blower. I will see what that does for me, and if not ecstatic, MIGHT consider upgrading to a F1A. Several sources have said that it is very streetable, just loud, and the D1 will not add very much over the P1-1 Will need to save money for that upgrade though

The unanswered question is the cam. I am being told, no matter my small cam, that I will need to go to dual springs. First, I don't know if the Darts will accept duals without machining (more $$) and with the cost of springs, should I spend a little more and get a powerful cam????
decisions, decisions

 

Dart Pro 1 LS1 Aluminum Cylinder Head 1.290'' Valve Springs
Looks like a common OD springs size I'm sure Brian Tooley can hook you up with some springs. Just need to make sure your locators and seals will work.

 

those are low numbers.. When done right. can make much more then that

 

You are right I just couldn't edit in time LOL. What can you get out of a D1?

 

A procharger vendor said 800rwhp was about the most he had ever seen from a D1 (he sells them) He thinks my P1SC1 could get in the mid to high 700's but a F1A closer to 1000rwhp if everything is set up right (not interested in those #s) I wont do anything until I see what the P1 can do I guess.

Thanks for the vendor SBG; I sent him a request.

 

haha.. just more... the p1sc1 can make a little over 800 setup on kill..

 

800rwhp??