Cam Specs...
05-24-02, 08:20 PM
#1
Lexus Test Driver
Thread Starter
Cam Specs...
Just thought I'd share some cam specs from the work done at Crower. These are regrinds of my stock cams.
Advertised Camshaft Specifications:
Intake 270 degrees Lift .362 Clearance Hot .006
Exhaust 268 degrees Lift .374 Clearance Hot .008
Intake opens 4.0BTDC
Closes 36.0ABDC
Exhaust opens 44.0BBDC
Closes -4.0BTDC
Lobe Separation 110 degrees
Duration at .050"
Intake 220 degrees
Exhaust 220 degrees
Lobe Lift
Intake .362
Exhaust .374
Cost is around $250 including 2nd day shipping and the necessary lash caps.
Process took around two weeks.
This cam profile is pretty close to the HKS 272 cams for the Supra TT. (A little more mild, but not much).
Its about as aggressive as recommended for a street car. Idle is said to be a little lumpy, but not horrible... We shall see.
Any questions, feel free to ask. These are supposed just like Ethan Bank's cams for his 1000hp SC300.
To compliment the cams, the car is getting upgraded Crower springs and TI retainers, Porting and polishing the head with 5 angle valve job. This should get it to the point where I won't have to redo it for awhile.
Advertised Camshaft Specifications:
Intake 270 degrees Lift .362 Clearance Hot .006
Exhaust 268 degrees Lift .374 Clearance Hot .008
Intake opens 4.0BTDC
Closes 36.0ABDC
Exhaust opens 44.0BBDC
Closes -4.0BTDC
Lobe Separation 110 degrees
Duration at .050"
Intake 220 degrees
Exhaust 220 degrees
Lobe Lift
Intake .362
Exhaust .374
Cost is around $250 including 2nd day shipping and the necessary lash caps.
Process took around two weeks.
This cam profile is pretty close to the HKS 272 cams for the Supra TT. (A little more mild, but not much).
Its about as aggressive as recommended for a street car. Idle is said to be a little lumpy, but not horrible... We shall see.
Any questions, feel free to ask. These are supposed just like Ethan Bank's cams for his 1000hp SC300.
To compliment the cams, the car is getting upgraded Crower springs and TI retainers, Porting and polishing the head with 5 angle valve job. This should get it to the point where I won't have to redo it for awhile.
05-24-02, 08:40 PM
#3
Lexus Test Driver
Thread Starter
$250 total for both...
Brian re-ground my used cams.
They look brand new!
Now all I have to do is rev the s#!t out of it to make power.
8000rpm should do.
Brian re-ground my used cams.
They look brand new!
Now all I have to do is rev the s#!t out of it to make power.
8000rpm should do.
05-25-02, 08:30 AM
#4
Bluegr*** Performance
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Congrats on the cams. Something I will check out once things get going for me w/ a t60-1. Your car is impressive. Through what rpm range is the best performance with your set-up?
AJ
AJ
05-25-02, 09:04 AM
#5
Lexus Test Driver
Thread Starter
As it was, the real sweet spot in the rev band was 3500-6000.
I may loose a little on the bottom end with the new cam profile, but it will mainly be the same only with a big kick from 5500-8500rpm.
With stock compression, since I can't boost higher, the only alternative its to rev higher.
Thoughts are that by moving the power up higher, I get a more progressive power curve as rpms increase. This will hopefully yield a big top end while limiting wheelspin.
In looking at the calculators for power---turbocalc, etc. The only way to increase power on the same gas, same engine, without introducing something else to the mix or raising boost is to spin faster. The only way to effectively spin faster is to keep the VE high so that you can make power. The cam profile, special valve job, porting and polishing and a general cleanup will keep the VE high at these RPMs allowing the power gain.
I'm hoping for around 500rwhp on pump gas at stock compression, with 350+rwhp as low as 4000rpm.
I may loose a little on the bottom end with the new cam profile, but it will mainly be the same only with a big kick from 5500-8500rpm.
With stock compression, since I can't boost higher, the only alternative its to rev higher.
Thoughts are that by moving the power up higher, I get a more progressive power curve as rpms increase. This will hopefully yield a big top end while limiting wheelspin.
In looking at the calculators for power---turbocalc, etc. The only way to increase power on the same gas, same engine, without introducing something else to the mix or raising boost is to spin faster. The only way to effectively spin faster is to keep the VE high so that you can make power. The cam profile, special valve job, porting and polishing and a general cleanup will keep the VE high at these RPMs allowing the power gain.
I'm hoping for around 500rwhp on pump gas at stock compression, with 350+rwhp as low as 4000rpm.
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05-25-02, 03:46 PM
#8
Lead Lap
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Originally posted by lexkid
Scott,
Did you have to get special shims to fit the bucket to get the cams to fit?
Much thanks in advance! I am sending my cams off next week!
Scott,
Did you have to get special shims to fit the bucket to get the cams to fit?
Much thanks in advance! I am sending my cams off next week!
05-27-02, 08:24 AM
#9
That's going to smooth out your power real nice,not too bad of a price either,it's still going to have a good midrange.
I've heard of a few turbo Porsche guys using an S cam with a similar profile to get the car to be less peaky on the top,and get more torque in the midrange.
I've heard of a few turbo Porsche guys using an S cam with a similar profile to get the car to be less peaky on the top,and get more torque in the midrange.
05-28-02, 06:01 AM
#11
Lexus Test Driver
Thread Starter
AEM or equivalent... Not decided yet.
I believe Dave H is going to try the AEM on his NA-T Supra.
Larry at SP has given me the indication that the Supra unit should be drop in compatible with the SC300. Larry is in the process of tuning the AEM on some Supras, he should have a stronger opinion on the AEM v.s. Speedpro within a few weeks.
Quite a few people have managed OEM or better drivability so far with the AEM unit.
I believe Dave H is going to try the AEM on his NA-T Supra.
Larry at SP has given me the indication that the Supra unit should be drop in compatible with the SC300. Larry is in the process of tuning the AEM on some Supras, he should have a stronger opinion on the AEM v.s. Speedpro within a few weeks.
Quite a few people have managed OEM or better drivability so far with the AEM unit.
05-29-02, 06:43 AM
#14
Lexus Test Driver
Thread Starter
I just wish Jeff would have bought this box instead of the Haltech, could sap off his base maps...
I've seen these on ebay as low as $1240... Anyone else have a cheap source? It looks like I'm gonna take the plunge for this mod. I just have to get the head back on and re-do my leak down test to make sure the compression is up to normal. If not, the money will have to go into a shortblock. Yuk.
I've seen these on ebay as low as $1240... Anyone else have a cheap source? It looks like I'm gonna take the plunge for this mod. I just have to get the head back on and re-do my leak down test to make sure the compression is up to normal. If not, the money will have to go into a shortblock. Yuk.
06-02-02, 09:45 AM
#15
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well i went with what my tuner likes and knows works......speed pro isnt bad...and AEM sounds good.....but i dont like being a guiene pig....i like known reliable products.....experience is worth the cash......and ill have HKS 264 cams in my sc upon completion...Jeff