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Old 06-02-2006, 10:21 AM   #1
ejh25
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Default Helix 264 or V8 cams

I need to make a decision quickly so any replies are welcome.
I will be running a GT30r .63 A/R on a built block and V8 big port heads. The questions is: should I go with a Helix 264 cam or stick with the V8 cams?
I won't be running AVCS in either situation.
My biggest concern is usable power and lower end grunt. I had previously thought the V8 cam would be my best bet but now am rethinking things.

Thanks,
Eric
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Old 06-02-2006, 12:15 PM   #2
mick_the_ginge
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Do a mixed cam set, 272 intake and 264 exhaust. that's what I am running and love it. if you don't want to do that do the 264's, they will open up the potential for far greater power up top.

If you are not running AVCS then don't run the V8 cams.
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Old 06-02-2006, 02:21 PM   #3
ejh25
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I'm just a little concerned that the I will loose some low end with the 264. I know the V8's were intended to be used with AVCS, but it was my understanding that the V8 cams were more aggressive than any USDM cam.
Thanks Mick for the reply.
- Eric
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Old 06-02-2006, 03:12 PM   #4
MY99 2.5GT
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Are you building the shortblock or is it stock compression?

What do you consider "low end" power?

With 264 you will lose low end even more with the 272s. The real question is how much low end are you willing to give up for a kick in the pants a little higher in the rpms?

What redline are you planning to set? That should also be a big factor in determing what cams to run. You probably won't be able to fully reap the benefits of 272s unless your reving to 8k or above.

264 should be a good choice for stock or nearly stock redline (sub 8k) on stock compression.

Brad
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Old 06-02-2006, 04:00 PM   #5
ejh25
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Redline will be 7500-8000 and compression will be bumped up a hair.
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Old 06-02-2006, 04:23 PM   #6
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Go with the Helix cams. Easier to get and if you have problems you dont have to hunt down another cam or pay a premium to get it.

-Matt
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Old 06-02-2006, 11:31 PM   #7
ejh25
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ShaggyGt,
Are you saying that I should go with the Helix if I have a cam sprocket (sp?) problem? I was thinking the V8 cams in the V8 heads would be easy and non-problematic. I guess the Helix 264 wouldn't be very expensive and I could do it easily.

I can easily afford the Helix 264 cams but I was thinking the V8 cams would be better suited for my purpose, I wicked fast spooling 2.5
I am all ears to advice...

I will make my decision over the weekend b/c the motor is in the build process and I am psyched.

Last edited by ejh25; 06-03-2006 at 08:53 AM.
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Old 06-04-2006, 09:57 AM   #8
ShaggyGT
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Quote:
Originally Posted by ejh25
ShaggyGt,
Are you saying that I should go with the Helix if I have a cam sprocket (sp?) problem? I was thinking the V8 cams in the V8 heads would be easy and non-problematic. I guess the Helix 264 wouldn't be very expensive and I could do it easily.

I can easily afford the Helix 264 cams but I was thinking the V8 cams would be better suited for my purpose, I wicked fast spooling 2.5
I am all ears to advice...

I will make my decision over the weekend b/c the motor is in the build process and I am psyched.
I am saying that in the event that something might happen to one of the cams, I doubt it, but something did it would be easier to get a replacement Helix cam than a Version 8 cam. Not only that but the price between the two should be quite a bit and availibility is very limited on V8 valvetrain parts. Plus with the Helix cams you have several combinations to choose from whereas Version 8 cams are what they are.

-Matt
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Old 06-05-2006, 09:53 AM   #9
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Quote:
Originally Posted by ShaggyGT
I am saying that in the event that something might happen to one of the cams, I doubt it, but something did it would be easier to get a replacement Helix cam than a Version 8 cam. Not only that but the price between the two should be quite a bit and availibility is very limited on V8 valvetrain parts. Plus with the Helix cams you have several combinations to choose from whereas Version 8 cams are what they are.

-Matt
Thanks for the advice.

I have decided on sticking with the V8 cams for now, hopefully I won't run into any problems.

The install should be complete by the end of July with dyno results a month later.
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Old 06-05-2006, 10:32 PM   #10
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Quote:
Originally Posted by ejh25
Thanks for the advice.

I have decided on sticking with the V8 cams for now, hopefully I won't run into any problems.

The install should be complete by the end of July with dyno results a month later.
here is my first tune on 20 psi with port and polished wrx heads and helix cams

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Old 06-03-2006, 11:54 PM   #11
Sadisticracer1
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how high should your compression be if you want to redline around 8500 and what cams are exactly needed? can stock ones we used to bump to that rpm range if the heads are port & polished stg3 with a 3angle valve job on all ports?
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Old 06-04-2006, 12:09 AM   #12
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272 sounds perfect for 8500+ redline. You will need shimless buckets or shim under buckets as well as stiffer valve springs and retainers. Some very good port and pollish work will be much need to run smoothly that high in the revs. I would have them rework the combustion chamber as well to smooth out some of the rough angles.
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Old 06-04-2006, 01:00 AM   #13
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Phil from Element is running Kelford 272's in his stock heads. I believe they are standard USDM STi. Stock meaning STOCK, no modifications at all.
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Old 06-16-2006, 12:22 PM   #14
Sadisticracer1
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Quote:
Originally Posted by MY99 2.5GT
272 sounds perfect for 8500+ redline. You will need shimless buckets or shim under buckets as well as stiffer valve springs and retainers. Some very good port and pollish work will be much need to run smoothly that high in the revs. I would have them rework the combustion chamber as well to smooth out some of the rough angles.
i will have stiffer valves springs and retainers to go along with the port and ppolish and 3 angle valve job. the combustion chambers are being honed and darton sleeved. would this work out with the stock cams to raise the redline safely or do they need to be modded to the 272's? where could i get 272's and are they usually really expensive thanks.
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Old 06-07-2006, 04:44 PM   #15
PeteDucati
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Quote:
Originally Posted by ejh25
The questions is: should I go with a Helix 264 cam or stick with the V8 cams?
What's the lift and duration of the v8 cams? If you don't know - you'd better find out.
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Old 06-08-2006, 09:49 AM   #16
ejh25
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Slight change of plans... I will be running a Hydra and utilizing the AVCS with along with a slight bump in compression.
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Old 06-08-2006, 11:44 AM   #17
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Let me know how this works for you. I never ran AVCS on my V8 heads.

As for me I'm about to get the Helix 264s and drop them in V8 heads. The main reason, I broke one of the JDM cams and gear, and the helix stuff is easy to come by and about the same price. I'll post with results if I ever finish
-Adam
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Old 06-15-2006, 12:25 AM   #18
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Quote:
Originally Posted by AK'S REX
Let me know how this works for you. I never ran AVCS on my V8 heads.

As for me I'm about to get the Helix 264s and drop them in V8 heads. The main reason, I broke one of the JDM cams and gear, and the helix stuff is easy to come by and about the same price. I'll post with results if I ever finish
-Adam
Holy crap... almost hte exact same situation as me. I broke the pass. side exhaust cam gear and the Helix prices are so sick that I might try it. For me, it'll be a drag car so I want the power up top over my stock jdm v7 cams/valvetrain. Hopefully it'll work out nicely, although without AVCS.
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Old 06-16-2006, 12:00 PM   #19
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go with crower....stg 2
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