turabo87

Getting the speed bug again, looking to push further the limits of my NA build. It runs awesome as a daily, but I want to push the NA stock bottom end limit with my current heads and the bottle neck is really the cam right now.

My current build:
LS1 5.7L Stock bottom end
PRC 227cc (CNC ported) heads, milled down 0.035" (currently a 57cc chamber instead of normal 62cc), approx 11.5:1 CR, with PAC dual valve springs (.660" capable)
Trickflow/Elgin E-1840P/Sloppy Stage 2 Cam - .585/.585/228/230 112LSA
Johnson 2110R Hydraulic Lifters
FAST 92 Intake + Mildly ported LS2 TB
K&N Cold air intake and air bridge + Fog light housing delete
Texas Speed 1-3/4 LT Headers + Off-road X Pipe
93 tune (24deg MBT timing at peak torque, 26deg at peak power)
Manual T56 with 3.42 rear end.
Currently pushed SAE 441WHP/431WTQ (STD 451WHP/441WTQ on DynoJet), peaked HP@6000RPM, peaked TQ at 4600RPM
CalvoTuned (HP Tuners myself)

Ok, so like I said, I want more NA power, I'm not quite ready nor sold on the idea of boost nor NOS. Boost is just out of budget and I'm not quite sold on NOS yet. I want to keep the car NA as an occasional HPDE warrior, while still knowing I didn't leave any stone unturned on NA. I'm ok with loosing some drivability at this point. So for me, what's left is upgrading cam and fitting the biggest cam that won't risk P2V clearance on a 0.035" decked PRC 227 casting and stock bottom end. Or maybe not necessarily the biggest cam, but best one to match my heads and maximize peak torque and power (looking to peak between 6500-7000). Keeping 93 would be ideal but not a must, I can switch to E85 for the cherry on top. But now I need some MAX EFFORT, SAFE P2V CLEARANCE cam recommendations.

PS: I know that P2V just has to be confirmed during the build, but I need to get close to knowing it will clear P2V because I don't want to go thru the trouble of the build to find out that P2V won't be sufficient.

Navy Blue 210

Cam Motion Low Lash Solid Roller Specced by Darth over on Tech (Holds the record for SBE ~ 540 RWHP)
Something like ~240*/248* ~114*+2* ~.650"/.630" (remember to subtract ~6* duration for Lash/ HR equivalency)
Tony Mamo Ported MSD Intake for the 6800-7000 Peak, shift ~7400 RPM.
If you Really want to max out your SBE.
JUST MY .02

turabo87

Ok, wow that's a true MAX effort!! I should've been more specific; looking to keep my hydraulic roller lifters and not have to fly cut my pistons, and keeping all my other mods; this is non-negotiable. I have Johnson 2110R lifters on it already. I was thinking more in the lines of like a BTR Stage 4 or Cam Motion Titan 5 LS1 Cam or maybe even the Titan King, if it clears P2V. Waiting on feedback from BTR and Titan for this.

FYI:
BTR Stage 4 N/A Cam: 233/248 .630"/.615" 111.5+2.5
Cam Motion Titan 5 LS1 Cam: 232/238 .621"/604" 113+4
Cam Motion Titan King LS1 Cam: 236/244 .621"/604" 112+3

Navy Blue 210

LOL OK
Titan 5 for the WIN
The others have much more OVERLAP/ Less PTV
TITAN 5 will be a SIGNIFICANT improvement on current cam ~25 -35 RWHP
still decent manners with a GOOD Tune.
Good Luck

NSFW

FWIW... I ran a TSP Torquer v2, 232/234 @ 112+4, and felt that it was just about right for HPDE. Maybe just a hair bigger than perfect, as there are two turns at my local track where I had to slow down enough to be out of the powerband, and downshifting to 2nd didn't feel right either... but still it was lots of fun. And I probably need to increase apex speeds anyway.

It made 450 on one dyno, and 475 on another.
Heads were milled for 11:1 compression (I forgot the cc) and the pistons were unmodified.
Fast 102 manifold, LT headers, LS2 throttle body.

It had 9 degrees over overlap. There was some surging in first gear under 1500 RPM, and it was just a slightly rough at the very bottom of 2nd (idling through my neighborhood) but totally fine on the street otherwise. Perfectly smooth on 35mph side streets, and cruising on freeway.

Idle tuning was easy. Return-to-idle tuning was another story... I was still working on that when the motor blew up. But I don't think the cam had anything to do with that.

The Titan 5 is pretty close - same overlap, but the powerband will start just a little later and you'll gain a few horses at the very top. The other two options have a LOT more overlap, as Navy_Blue said.

Rob Petyo

Mine ran a 248/248 648/648 and I was running low 10 second passes with SBE. We did fly cut the pistons. HP was low BC of the heart breaker Mustang dyno (418) ... Best of luck with breaking the current SBE NA time of 10.22.

vid in sig

turabo87

Well my plans for bigger cam got cancelled. After talks with both BTR and Cam Motion, neither recommended to go any bigger than what I currently have without either fly cutting pistons or new pistons with valve relief. I won't be doing either anytime soon. BTR sounded pretty confident that their Stage 4 NA cam could bump me anywhere between 480-500WHP, but anything larger than my current cam risks P2V.

I'm looking into nitrous now to feed the speed bug again. Possibly a Wet Kit with 125-150shot.

EVL JAKE

BTR Stage 4 is a bad *** cam on the high revs. I went with a more "mild" cam from TSP that has a broader power increase starting lower in the rev range. If it wasn't for covid lead times I would sent my 243 heads to PRC for stage 2.5 treatment. A stage 4 will run like a raped ape in the upper revs with your heads and still give you adequate PTV clearance. If you want a big cam that takes to nitrous well, the TSP MS3 is the ticket.

turabo87

My heads are milled (PRC 227cc (CNC ported) heads, milled down 0.035",currently a 57cc chamber instead of normal 62cc.) and my bottom end is stock. After consulting with BTR and TSP, they both recommended to not change my cam due to P2V risk. Anything larger than a Stage 2 for me would be risking P2V according to them. I'm doing nitrous soon and just enjoying the car as is with the nitrous on occassions.

XLR8-R

In my opinion there are a lot of medium size cams that would increase your horsepower significantly over the Elgin/Sloppy. Specifically the BTR Stage 2 (if BTR says it will clear your pistons). The BTR Stage 2 would also work well with nitrous based on the split duration.

Rob Petyo

Just fly cut the pistons and GO BIG!

Justin Raney

May i ask if you have the elgin sloppy stage 2 228/230 cam that sells on ebay from 150$-250$ or sometimes even 100$ i had seen? Or may i ask where you purchased the cam.

cv67

Thats actually small for a solid roller (the 242)
Max effort NA can get real expensive..you can only do so much with that stock bottom end and juicer cams