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Discussion starter · #61 ·
The engine has 5k miles on it!!!! Ended up doing a Dyno run and got 250 wheel hp. I was really disappointed in these numbers but then remembered that the engine was built for the compcams 273 xfi cam. I'm installing that this weekend and we'll see what additional number I can get from that.
 
What cam is in it now?
 
I got a book showing a dyno graph of the stock vs 273, I’ll post it this evening. The toque falls way. Off under 3500ish but the hp just climbs away after 4500-5000
 
Discussion starter · #67 ·
That's the plan!!!!! I will say this it does sound mean as **** with the flowmaster 40 Delta. So what's the final gain everyone. What do we think just adding this cam will do? You have a few weeks to get your guess in as im currently working 12 hour shifts 7 days a week.
 
I got a book showing a dyno graph of the stock vs 273, I’ll post it this evening. The toque falls way. Off under 3500ish but the hp just climbs away after 4500-5000
If that's the one I'm thinking of I think it was done with 5.7 heads.

Personally I think your better off with a stock 6.1 cam installed @ 6-8 Degrees advanced.

But that's not the question, Between 3k-6200 you should see about a 35-50 Hp gain with the 273 , the spacers should help pick up some bottom end due to lengthen the runner but top end will suffer due to the shape transitions from 5.7 intake to 6.1 Head. ,
I'm thinking about 10-40 TQ gain from 3300-5100, Above 5100 is where this stick shins in the HP/TQ department big #s over 5500 RPMs is not uncommon for the 273 …
below 3300 might see a loss of about 10-20Hp/20-30Tq but the added runner length might help with the under 3300 ..
Now this is with a good tune, keep in mind this cam was designed to live above 3500 Rpms. a good set of 4.56s or even 4.88s will make that truck a monster..

I'm guessing HP is 355@4900-5100 TQ is 370 @4000-4400 RWHP/TQ

I'll go a step farther and say after the 273 your 1/4 Mile times should be about low 14s @ about 95MPH...your a QC 4x2 correct?

A 6.1 intake and the spacers I'd add 10Hp to my guess, TQ above 4400 I would guess could be as much as 15 higher.
 
Discussion starter · #70 ·
I'm waiting on the gears. I'll be putting in a tr6060 from a Challenger first then I'll do the gears. After that I'll end up building another short block that'so 5.7 based but bored to 3.927 and stroked to 3.8. Callie's all the way. This is prep for a turbo that should come later. I'm coming for you charged392 😂😂.
 
I'll be putting in a tr6060 from a Challenger first then I'll do the gears. After that I'll end up building another short block that's 5.7 based but bored to 3.927 and stroked to 3.8. Callie's all the way. This is prep for a turbo that should come later.

That sound interesting. :thumb::thumb: :popcorn:

This is one of those times when I regret decommissioning my 03. :facepalm: Can only afford one hopped up truck... :sad:
 
LOL simmer down stu.....
 
I'm waiting on the gears. I'll be putting in a tr6060 from a Challenger first then I'll do the gears. After that I'll end up building another short block that'so 5.7 based but bored to 3.927 and stroked to 3.8. Callie's all the way. This is prep for a turbo that should come later. I'm coming for you charged392 😂😂.
6060 will frees up about 20-25 Hp over the 545,

Curious why 3.927 X 3.8(3.795) ? that's 368 Ci
No wrong answer, I just like picking people's brains on why they choose the combos that choose.
 
There are several motors here on the forum using 4.080 cranks running boost over 15 psi that are without issue. Big heads and suitable cams will get you big numbers.
 
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