As the title states I've been debating a few future mods for my LT1. With the old 195cc trickflow heads I'm guessing I have lost a considerable amount of compression. At the time I wanted LE2s but like a noob settled for some less than mediocre heads. I was originally at 11:5:1 with stock heads. The TFs have a 62cc chamber.

The car is mainly used as a nice weather fun dd. It has been to the track once but I plan on going back a few times over the summer. My question is what would my best route be as far as mods? I've kicked around the idea of 1.7 rrs to get a bit more lift out of the 503. Or to just do a cam swap, or go the whole 9 yards and go H/C swap. I am wanting to hit the 400rwhp mark btw. Sorry if this is hard to read I typed it from a blackberry. Any input is greatly appreciated!

 

get the heads milled, pick up a bigger cam, enjoy. get the heads ported as well if you haven't already.

1.7 rocker swap may be easier than a cam swap but price difference will be minimal at best. also the cc503 isn't ground with 1.7 rockers in mind.

 

mods are as followed

Ford 9" with 3.70s, Nitto NT05s, Bilstein HDs, Boxed SFC, MSD 6AL2, Tick Perf Stage 2 T-56, Spec 2 clutch, Forged 383, Pacesetter LTs, SLP LM2, TFHeads & CC503&1.6RR

 

double post...

 

Get the 1.7 rr's and go for the tune. put off the h/c and go LE+new cam later.

Calculate your lift with current cam+1.7.....and also with possible future cam+1.7 if future cam is too much w/1.7rr then keep current RR's and go h/c then tune.

Or run 1.7rr + LS1 intake mod. Then wait till later to do the h/c then tune.
Nice setup.

 

The real gain from installing 1.6rr comes from a reduction in friction and mass.
The additional lift from going to 1.7s won't get you much (if anything).

I love the 503 in a 350, but to get the most out of your 383, you really need a cam with
a little more duration and heads (and valves) that can move more air. At that point, the
money invested in a new tune will be well worth it.

 

I respectfully disagree.

 

Same here.

 

I run those heads on a stock shortblock. My compression is low at around 9.2-1. In your case with a 383 that 503 is a little peanut cam. Upping the compression back up to over 10-1 won't get you 100hp like some will make it out to be. You will be down around 20-30hp at peak. I think that cam is killing you. That cam is perfect for a 350 with stock heads, not a 383 with heads that flow 250cfm.

 

x3...but at least we're sharing info. so either way thanks for participating.

 

the 1.7,s wont gain much , if I remember right I gained around 7 hp

 

I want to be a snake hunter when I grow up

 

borderline best post ever made... just saying

 

gregrobs nuthanger ^^ just sayin

 

the 2 biggest posers on this site ,hahaha cant believe you have pics like that on hand wicked94z and cockenballs in your location ,nice but fits ,lol

 

Isn't 7rwhp about what alot of people gain (on a mild set-up) when they pay an extra $100 and up for a custom grind cam vs. an off the shelf one with similar specs? I'm not saying a custom cam is not better....just that 7rwhp gain is not bad. I'd rather gain 7 from swapping rockers than 10 from doing a cam swap. But then again, I'd rather pay $150 for a good used proven shelf cam and run some good rockers too. I will be running a cc503 with 1.7's.

This post has NOTHING to do with the above comments.....but that's funny as hell!!!

 

Im still running the 1.7 on my lt1 ta , the scorpions are around 230 bucks but there nsa so you will need guideplates and hardened pushrods and you will have to gut your valvecovers to clear them and also my gain was untuned and over the 1.6,s so it would be a bigger gain over stock , good luck

 

1961ba427 also has 1.7 Scorpions and all the hardware and got it for a pretty good price and got 2 extra ones...............wonder who would be nice enough to do that..

 

the price difference between a custom cam and an off the shelf isn't very large when comparing new prices. $300~ shipped from LE vs $260-280 + shipping from most online sites.

 

Charlie Sheen??

lol Thanks Ryan. Now if I get around to installing them will be nice.