cams and 8500 rpm redline.

[ZSPTurbo]

If I plan on revving my engine to 8500 regularly, is the stock cam sufficient there? I would probably have it relobed to like 103 intake and 116 exhaust, maby not that much though.

I was just wondering if it would be worth it to go with hks/crower cams.

 

[Violater101]

Your upgrading the springs correct? I think they the gain on a 272 hks intake cam is around 25hp after 8000 rpms. Its about the same as the 264 intake cam up to that point. I just got my 264/272 combo in and love it. 15lbs of boost feels like 18lbs from before and 4th gear pulls just as hard as 3rd gear now

 

[L2RTSiAWD]

I would go all 272's if you plan to rev to 8500. Your stock cams are worthless @7k.

 

[ZSPTurbo]

Originally posted by L2RTSiAWD
I would go all 272's if you plan to rev to 8500. Your stock cams are worthless @7k.

well, I would like to have a steady idle, and Im not hellbent on crazy power.... can I still have a steady idle with the 272s? or should I get
264s? or should I get a 272 intake and 264 exhaust, or visaversa?

guide me, oh wise ones

 

[FastRthenU]

The Hks cams are known to have a nice idle. I would also suggest the 272 alround

 

[ZSPTurbo]

anyone else going with the 272 thing? I want to get a couple more opinions before I lock it in

 

[L2RTSiAWD]

There are a few others who use 272 all around.

 

[Violater101]

Originally posted by ZSPTurbo



well, I would like to have a steady idle, and Im not hellbent on crazy power.... can I still have a steady idle with the 272s? or should I get
264s? or should I get a 272 intake and 264 exhaust, or visaversa?

guide me, oh wise ones

I'm not wise, but I don't know many that go with a 272/264 combo. If you were a 2g, I think you could get it to idle with no problems running the dsmlink, but your not. Are you going to run a sheet metal intake? If so, then i would say you will have some problems with idle, and it definately won't idle like stock. My car idles fine with the dsmlink and 264/272 combo. If your going that big and plan on revving that high, then go 272 all around imo. The gains are just too much to ignore.

 

[candela]

violater is right...
Some people complain about the idle with a 272 intake, but they are wussies If you are going to be shifting up that high for whatever reason then the gain of a 272 over a 264 (considering they are the same price) is much better. I have 272's with my setup, Im installing my motor as we speak and plan to do a nice reveiw of my setup...


Austin

 

[13secGST]

how are you putting the limiter at 8500...do you have a different MSD ignition that allows it or can you do that kind of stuff with dsm link? Is it safe on a daily drivin engine...8500 is kinda high it sounds like, me with my stock T-to small turbo shift around 6000-6500 rpms cause above that it just stops pulling. when I upgrade will i notice a difference in the engine liking to be at high revs cause right now it seems like it wants to kill me for taking it to 7500. Even the 00+Celica GTS which LOVES to rev only goes to 8300 rpms...if any of you have ever test driven that you would agree that, that car loves to rev and is pretty fast in stock form...just not much room for improvement.

 

[DAskren]

ZSPTurbo - I am installing 272s this week. I am planning on turning my 1G to 8300-8500. I have been told the full 272 combo doesn't add any power below 6800-7000. Not sure how true this is, but for the enormous gains above, I'll sacrifice the lower end gains. If you are going to daily drive the car, you would likely enjoy the 264I/272E more. Also, has the trans been upgraded? Stock tranny won't shift at 8500.

 

[rdrkt]

Guys cams are only 1 piece of the high revving puzzle. You still have to makes sure your turbo can make power at that level and the stock intake manifold can also be a restriction at that RPM. Not to mention your knock count on pump gas. Unless you guys have 50trim or larger turbos why bother revving so high? You will end up running WORSE times than shifting sooner and staying in your powerband.

 

[DAskren]

Actually, its a 7cm stage 3 50 trim T04E, with huge fmic, 660s, 3", EPROM, AFC. It should do well at 26psi on c16.

 

[talonted_one]

I agree what rdrkt is saying, but you also have to worry about valve float

cams are only a part of the redline equation.

if you want power you are going to have to make sacrifices...if you dont idle like stock cry your 2 tears and walk a supra down and be happy.

 

[DAskren]

Very true. Without a good set of springs, and upgraded retainers, you'll never make use of the high RPM power. Look at the Crowers for a good value. Around $240 for the springs and retainers.
Dave
92 Laser AWD

 

[rdrkt]

Originally posted by DAskren
Actually, its a 7cm stage 3 50 trim T04E, with huge fmic, 660s, 3", EPROM, AFC. It should do well at 26psi on c16.

A 7cm turbo on a car with a stock intake manifold is going to see a BIG power drop off around 7500. I am basing this off of the many dyno charts that I have seen with Greens. With a pair of 272s AND a SM intake manifold then the power drop off will not be as dramatic. But more than likely you will still make peak power under 7200 rpms.

 

[talonted_one]

why 8.5k any way????

last time i checked we were DSMs not honduhs.

we have turbos...turbos make torque....peak torque isn't made at 8k rpm

 

[DAskren]

I think I'll use the Polk manifold eventually, but not necessarily before a SFP or turbonetics manifold and Garrett hot side. Oops, getting a bit poff topic :-(
Dave

 

[Blitz]

Originally posted by rdrkt

A 7cm turbo on a car with a stock intake manifold is going to see a BIG power drop off around 7500. I am basing this off of the many dyno charts that I have seen with Greens. With a pair of 272s AND a SM intake manifold then the power drop off will not be as dramatic. But more than likely you will still make peak power under 7200 rpms.

A little offtopic, but what type of dyno numbers have you seen with green turbos? I've seen Dre's dyno sheet with his green turbo.

 

[ZSPTurbo]

1) talonted one, you are not wanted here. you are just repeating what other people told you, and it doesnt apply.

2) rdrkt, you have seen the other threads I've posted.... I habe all the other #### lined up. Crower valvetrain, aftermarket intake manifold (dont know which one yet, expect a post soon ), Im gonna be running toluene (when I pump up the boost), and your favorite turbo rdrkt.... t3/t4 50 trim.

now, this Q is just for rdrkt:

this will be a daily driver, and I would like to have some power down low. It will go to 8500 sometimes, but not constantly. I would like it to have power below 7k rpm. should I go with the 264I/272E? Thats the combo Im leaning towards right now.

 

[larryd]

is your head ported?? If your running a ported head and sheet metal intake manifold you should go ahead with the 272s. The only downside to the 272/272 is a lump idle and slightly longer spoolup time on your turbo.

 

[Thalomos]

For a street car, with say a green turbo, slightly ported head, and stock intake manifold, would cams be worth it?

 

[TSi92]

I also race a '98 AWD talon that has crower 272/272's and venom sheet metal intake built and fully balanced and blueprinted 1G block with ross/pauter internals bce head with double springs etc. and a 60-1. The car idles very lumpy but I sure love it!! Plus it depends what fuel management you have. The only problems I have with shifting at 9000 rpm's is actually finding the gears. I have to shift slow if I wanna engage the gears and they still grind.

 

[larryd]

Thalamos.. for anything over a stock turbo size once youve done all of your other upgrades, I think cams are definitely worth it.

TSi92.. crower doesnt make a 272/272.. thats HKS.. crower is stage 1-3

 

[rdrkt]

Originally posted by ZSPTurbo
now, this Q is just for rdrkt:

this will be a daily driver, and I would like to have some power down low. It will go to 8500 sometimes, but not constantly. I would like it to have power below 7k rpm. should I go with the 264I/272E? Thats the combo Im leaning towards right now.

ZSP you will have a pretty decent area under the curve. One of the reasons that I love the 50 trim so much is that it is small enough to still have great boost response and make GREAT pump gas power but big enough that if you want to turn up the boost you can hit mid 11s. As for your question. You own a turbo DSM it will never ever be a 302 mustang with 4.11s. Your car wants to make power above 4000 work with it not against it. I think the 272i would offer a substantial increase in top end enough to offset the slight loss in midrange.