My quest for a stock bottom, 450hp LS1
09-07-2017, 11:07 AM
#22
For a street car, I'm not sure I'd go over 228 duration. My neighbor has a 6.0 GTO with a 231 cam and said it was at the edge for drivability.
Last track day, there was a guy with a Mallet Corvette that put out about 500 HP. The previous owner had $32,000 in just the engine. The new owner said he'd like to drive it on the street but the car couldn't hold a decent idle. Bigger isn't always better.
Last track day, there was a guy with a Mallet Corvette that put out about 500 HP. The previous owner had $32,000 in just the engine. The new owner said he'd like to drive it on the street but the car couldn't hold a decent idle. Bigger isn't always better.
09-07-2017, 12:39 PM
#23
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Duration is not the end all on driveability. It's overlap. Longer durations tend to overlap more but you can get less overlap and decent duration.
And anyway, if you're looking at 228 range cams, you'll need great heads to hit power goals, but it'll drive great
You could do a 230/236 that will drive nice. Just put it on a 114 + 4. You'll want to run 11.5 compression with that. But you'll only have five degrees overlap and it'll rev good.
And anyway, if you're looking at 228 range cams, you'll need great heads to hit power goals, but it'll drive great
You could do a 230/236 that will drive nice. Just put it on a 114 + 4. You'll want to run 11.5 compression with that. But you'll only have five degrees overlap and it'll rev good.
Last edited by Darth_V8r; 09-07-2017 at 12:44 PM.
09-07-2017, 01:02 PM
#24
With such a goal, I'd avoid the forced induction nonsense. A supercharger is going to cost more than the heads and cam package he's looking at, as will a turbo setup. Not to mention, swapping the heads and cam in will be easier than hacking up your radiator support, replacing headers, routing exhaust, down pipes, possibly getting rid of your A/C or getting a turbo K-member, and the other crap that goes with a turbo swap. Sure you'll make more power, but not everyone wants to go through all that trouble.
09-07-2017, 01:28 PM
#25
I was trying to see how much you cared about driveability. If DD is a concern, here's how I would go:
TFS220's or mamo 223's for heads
Fast102
228/234-114+2 cam. 650/630 lift
PSI Springs and titanium hardware
ATI balancer
Measure for pushrods length. Never guess
1-7/8 headers
Speed engineering dual exhaust
If DD is not really a concern, then disregard this post.
TFS220's or mamo 223's for heads
Fast102
228/234-114+2 cam. 650/630 lift
PSI Springs and titanium hardware
ATI balancer
Measure for pushrods length. Never guess
1-7/8 headers
Speed engineering dual exhaust
If DD is not really a concern, then disregard this post.
09-07-2017, 02:52 PM
#26
FWIW, i have TMS 799's which are a budget head, tick sns 2, 231/235. fast 92/92, 1&7/8 long tubes. Can drive around town if i want, every now and again a lil cam surge but nothing bad, put down 450whp and 420tq. pulled to 6700rpm. Very fun car so far.
09-07-2017, 03:02 PM
#27
We have a kit very similar to the hawks setup only uses a fast92/92nw tb, new FAST42lb ls1 style inj tps 5.3 2.5 cnc heads and a cam. itll make at least 450 on a manual and mid 400s on a stall.
The whole package runs $3999 shipped. includes everything you need PLUS all the gaskets, bolts, seals, cam thrust plate, billet timing set, ported oil pump, pushrods, 85mm truck maf conversion with all couplers. More inclusive than any kit out there and cheaper too!! Add porting to the fast 92 for $200 more.
The whole package runs $3999 shipped. includes everything you need PLUS all the gaskets, bolts, seals, cam thrust plate, billet timing set, ported oil pump, pushrods, 85mm truck maf conversion with all couplers. More inclusive than any kit out there and cheaper too!! Add porting to the fast 92 for $200 more.
Last edited by tech@WS6store; 09-07-2017 at 03:10 PM.
09-07-2017, 03:33 PM
#28
TECH Senior Member
I would think the above kit with your hi-lift hot cam would be a wicked-sounding BUT smooth-running beast! Not sure of the power level though..
09-07-2017, 04:16 PM
#30
TECH Senior Member
Right... I thought it would be a fairly stout cam to get those numbers..
Any thoughts on HP numbers on that kit with the hi-lift hot cam?
Any thoughts on HP numbers on that kit with the hi-lift hot cam?
09-07-2017, 09:55 PM
#31
I'm referring to the maroon Mallet C5 Vette that ran at Nelson Ledges earlier this year. There is a pewter Mallet C5 Vette that runs at Pitt Race. I'm guessing that they are pretty much the same setup. BTW, that Mallet LS1 engine cost the original owner $32,000 to have built.
09-08-2017, 11:09 AM
#33
That TSP PRC Stg II 5.3/MS4 package has been putting down 450whp and 380wtq for years...it's nothing new.
Personally if you like the TSP package price, then get those heads, step the cam down to the 228/232 or Torquer V4 and go with a Fast 92/92. The intake will make up the difference in peak power of the bigger cam and it will drive nicer. I also did not recommend Fast 102 because they can be a pain to tune. If you have a good tuner around you then disregard and go 102.
Also do not skimp on the valve train...that makes or breaks a good combo. Get a Straub bushed rocker, a quality lifter(Morel 5315 or Johnson 2110), and get your push rod length correct. It will be a fun combo.
Personally if you like the TSP package price, then get those heads, step the cam down to the 228/232 or Torquer V4 and go with a Fast 92/92. The intake will make up the difference in peak power of the bigger cam and it will drive nicer. I also did not recommend Fast 102 because they can be a pain to tune. If you have a good tuner around you then disregard and go 102.
Also do not skimp on the valve train...that makes or breaks a good combo. Get a Straub bushed rocker, a quality lifter(Morel 5315 or Johnson 2110), and get your push rod length correct. It will be a fun combo.
09-08-2017, 01:37 PM
#34
TECH Senior Member
^^^^Good thinking!^^^^^^
09-08-2017, 09:15 PM
#35
I wish I would have saved up another couple grand and just went with a D1SC. It's a lot of cash up front but would have been done right for me the first time. And personally 450rwhp got old fairly quick, it's really not that fast IMO.
09-09-2017, 09:08 PM
#36
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That TSP PRC Stg II 5.3/MS4 package has been putting down 450whp and 380wtq for years...it's nothing new.
Personally if you like the TSP package price, then get those heads, step the cam down to the 228/232 or Torquer V4 and go with a Fast 92/92. The intake will make up the difference in peak power of the bigger cam and it will drive nicer. I also did not recommend Fast 102 because they can be a pain to tune. If you have a good tuner around you then disregard and go 102.
Also do not skimp on the valve train...that makes or breaks a good combo. Get a Straub bushed rocker, a quality lifter(Morel 5315 or Johnson 2110), and get your push rod length correct. It will be a fun combo.
Personally if you like the TSP package price, then get those heads, step the cam down to the 228/232 or Torquer V4 and go with a Fast 92/92. The intake will make up the difference in peak power of the bigger cam and it will drive nicer. I also did not recommend Fast 102 because they can be a pain to tune. If you have a good tuner around you then disregard and go 102.
Also do not skimp on the valve train...that makes or breaks a good combo. Get a Straub bushed rocker, a quality lifter(Morel 5315 or Johnson 2110), and get your push rod length correct. It will be a fun combo.
09-10-2017, 07:55 AM
#37
With such a goal, I'd avoid the forced induction nonsense. A supercharger is going to cost more than the heads and cam package he's looking at, as will a turbo setup. Not to mention, swapping the heads and cam in will be easier than hacking up your radiator support, replacing headers, routing exhaust, down pipes, possibly getting rid of your A/C or getting a turbo K-member, and the other crap that goes with a turbo swap. Sure you'll make more power, but not everyone wants to go through all that trouble.
09-11-2017, 10:48 AM
#39
I did my own HC and dont see how a D1 would be harder. Radiator has to come out with both and with a D1 you dont have to mess with the top end.
My tuner does custom turbo installs out the door with a tune for 5k. You just need to supply the fuel system. Call around and do some research before you pull the trigger on HC.
My tuner does custom turbo installs out the door with a tune for 5k. You just need to supply the fuel system. Call around and do some research before you pull the trigger on HC.