My current combo is in my sig under new car. The cam specs are: 230/236 .510in. .520ex. 114ls. The flow #'s are as follows:
.200 132in. 105ex.
.300 184in. 133ex.
.400 224in. 165ex.
.500 238in. 187ex.
.600 249in. 199ex.
.700 N/A 206ex.

What i'm looking to do is a set of out of the box TFS heads(flow numbers are a little better than mine),GMPP 847 cam, Pacesetter LT's and y-pipe. I also have a home ported intake I will use. Will I just be spinning my wheels and wasting $$ or will I see a solid hp gain with these mods?

Thanks,
Rich

 

45 views and no comments? Do I stink? Or is it a dumb question?

Rich

 

a 114 lsa on a N/A setup kills low end torque, so anything better then that will help you. I dont use the gm847 but it makes great power. What power were you making for the old setup??

 

I'm not too sure what you'll pick up from changing cams but a better set of heads should net you some decent gains. My guess would be 30+ rwhp for both.

 

Well, I assume that those flow numbers are your current numbers and since they are pretty low, I'm sure that if your new heads flow around 260-270 intake and 185-195 exhaust that you will see a defenfite improvement--wonder why your intake numbers are so low? Anyway sounds like a nice combo.JMHO

 

you will probably loose a little with that combo.
the head flow a little better, and will flow alot if you got them ported, but they have a bigger combution chamber so your going to loose compression.

 

Good call on the compression ratio. What kind of power do you make now? A bigger cam and a little better flowing head will make more power in the upper rpm's if everything else is equal. Mid should stay the same and you might lose on the low end.

 

Yeah I think the guy I got the car from had it built for better driveability. I have no power numbers as of yet, I will get it dynod for a baseline before I do the swap.

These are locally ported heads from I dont know where so I really dont trust them to make too much power.



Losing compression did cross my mind but my budget wont allow ported/worked heads. I could always get the TFS heads milled, I believe that is an option when purchasing them.

I'll have to check pricing on LE and AI heads but you cant beat TFS for $1300 out of the box. I'd love to do AFR's again but that would blow my whole budget just for heads, would a set of AFR 210's work with my combo I currently run?

Thanks,
Rich

 

http://www.trickflow.com/product/che...t1_airflow.asp


really they dont flow that well out of the box.

your 383 does need some more air though.
thats a hard one, might want to get some bare trick flows and wait till you can afford to get them ported and milled. once thats done have a custom cam ground and you would have a screamer

 

Yea, The trickflows can easily be surfaced to give the same combustion chamber CC's as an LT1 head......(when I last looked) summit was even selling sets with a seperate partnumber that were already surfaced from trickflow with LT1 sized chambers ready to bolt on, so thats not a problem.......but In my opinion If your gonna go thru all of the work of doing heads and a cam and your dead set on the trickflow heads, I would have them ported by someone like Lloyd Elliot, that way you'll really have a big advantage over what you have, not just a minor 15 to 20 CFM advantage that the stock port trickflows will give over your current flow specs...... most of the guys that I've personaly seen that have used the trickflow heads with stock (as is) ports are not that thrilled with them(even with the right cam and compression)........either way you cut it your 383 is begging for a pair of we'll done 300CFM heads....... good luck ...........Joe

 

Did alot of searching and reading up on the LE3 heads/cam package. Sounds like some good stuff and pretty reasonable. I'd just be in it for around $400 more compared to the TFS and 847, better do some more man whoring. I also got a set of 38lb and 42lb injectors and a inline T-Rex pump from my Mustang bin!

Rich

 

I think i'm sold on the LE3 stuff, its cheap and from what i've read its makes some good numbers. I'll hold off on the TFS or AFR's for another few years I guess. One thing I need to do and I hope it works is use my fiber optic bore scope to look inside a combustion chamber and hopefully get an ID on my pistons. I have no part numbers for them and the guy I got the car from said that they didnt come with the stroker kit from Lunati but he cant recall what they are. I'm really hoping I can put down around 410-430rwhp plus my 150 shot, that would be b'dass.

Rich