Thrasher cam

[LETZRIDE]

Looking to be possibly upgrading my cam, since it will most likely need replacing...I want to go with something more aggressive then the ARH cam...

How about the Thrasher Engineered Performance Race Cam?

TEP Race Cam Specs:
- Duration at .050 = 222 degree intake/222 degree exhaust
- Intake Lift = .354 (.566 lift with stock 1.6:1 rocker ratio)
- Exhaust Lift = .354 (.566 lift with stock 1.6:1 rocker ratio)
- Lobe Separation = 114.0


From what I can tell it seems to be a FI cam...BUT...I was thinking of changing it a little bit...they say that N/A cams should have identical or closely split lift and duration...which this cam has the same lift and same duration...but N/A cams should also have somewhere between 110-113 LSA

so what if I had a custom cam built with the above specs, with the only difference being 110 LSA?

any thoughts on what I might gain out of this?...I'd swap my 130# springs in, and put a double roller timing chain on...

[thedetailman]

Re: Thrasher cam

I don't see any problem with that idea. Seems completely plausible.

[N2OEQIP]

Re: Thrasher cam

and you happen to know which lobe they use???? Nope.

[LETZRIDE]

Re: Thrasher cam

and you happen to know which lobe they use???? Nope.

what do you mean?

[thedetailman]

Re: Thrasher cam

N2OEQIP...if you know then please post.
I Am interested in this as well.

[bigbrian442]

Re: Thrasher cam

what do you mean?

If you want the same cam with a different LSA, you need to know what lobe pattern was used to grind the cam. With out that you will have to see if that company will have a custom cam ground for you using that pattern.

[LETZRIDE]

Re: Thrasher cam

so if thrasher doesnt, and doesn't want to grind the cam...I couldnt contact comp cams and tell them it was for a 3800 and give them the specs, and they would know what kind of lobe pattern to use?

I sent thrasher an email last night when I posted this, so I am hoping for a response today...

[Meemperor]

Re: Thrasher cam

I'm 90% sure Thrasher doesn't do business anymore..but hey I've been wrong before!

You might want to talk to PRJ, he knows his stuff when it comes to these things and 3800's.

http://www.prjperformance.com/

[LETZRIDE]

Re: Thrasher cam

I'm 90% sure Thrasher doesn't do business anymore..but hey I've been wrong before!

You might want to talk to PRJ, he knows his stuff when it comes to these things and 3800's.

http://www.prjperformance.com/

I don't see any cams on there site?

[N2OEQIP]

Re: Thrasher cam

http://www.compcams.com/Technical/Ca...obeCatalog.pdf

2007 catalog page 62.

[LETZRIDE]

Re: Thrasher cam

I don't get it...what about the lobe index page?

I know some guys get custom cams done...how do they know what lobe profile to follow?

[techsan23]

Re: Thrasher cam

You dont normally see a lsa lower than 112 on the 3.8's. You might want to see if you can find a dyno sheet on this cam and compare the rpm:power output to your desired rpm range. From what I have seen you normally drop about 300rpm off of peak range for every 1 degree of lsa you remove.

[LETZRIDE]

Re: Thrasher cam

can't find a dyno sheet on it...so why is it that power adder cars have higher 114 lsa's?

[N2OEQIP]

Re: Thrasher cam

You need someone who knows what they are doing. Forcefirebird did mine. Hell I have one of the "secret lobes" , that only guys who pay to have special access too. lol

[LETZRIDE]

Re: Thrasher cam

I messaged him, but I havent had a response yet...