LS2 N/A w/243’s making 600hp to the tire
03-02-2018, 12:25 AM
#1
Burning Brakes
Thread Starter
LS2 N/A w/243’s making 600hp to the tire
Just finishing up some mods on my intake and fuel system on my 404. I'll post up the most recent dyno sheet I have, she was dyno'ed at the end of January. Was running Klotz octane booster @ 4oz/gal.
As a US Marine I don’t give up, and I want to prove what a SOLID set of 243’s are capable of. Charlie at RPM Motors did these heads and they are pretty outstanding; made 538 to the tire with heads, cam, vaccuum pump, and methanol injection.
The addition of the stroker crank(4”), CP pistons, and Carrillo rods in 2015 made 575rwhp w/methanol injection and no Klotz.
With the addition of these recent intake mods I’ve completed & methanol she should be well over 600 at the tire, but we’ll see here in the next week or so.
P.S. Austin took over RPM Motors as Charlie has retired. Now the shop is called Paragon Engines. Austin is one of the most HONEST and knowledgeable engine builders that you will find. He’s VERY qualified in tuning as well. Anyone who’s tuned a 102mm TB for street use N/A application knows how much of a bear it is.
Austin can literally can do it all when it comes to cars; more specifically Corvettes. He chooses to stick to tuning and engines, because he loves it the most.
As a US Marine I don’t give up, and I want to prove what a SOLID set of 243’s are capable of. Charlie at RPM Motors did these heads and they are pretty outstanding; made 538 to the tire with heads, cam, vaccuum pump, and methanol injection.
The addition of the stroker crank(4”), CP pistons, and Carrillo rods in 2015 made 575rwhp w/methanol injection and no Klotz.
With the addition of these recent intake mods I’ve completed & methanol she should be well over 600 at the tire, but we’ll see here in the next week or so.
P.S. Austin took over RPM Motors as Charlie has retired. Now the shop is called Paragon Engines. Austin is one of the most HONEST and knowledgeable engine builders that you will find. He’s VERY qualified in tuning as well. Anyone who’s tuned a 102mm TB for street use N/A application knows how much of a bear it is.
Austin can literally can do it all when it comes to cars; more specifically Corvettes. He chooses to stick to tuning and engines, because he loves it the most.
Last edited by HC Mechanic; 03-02-2018 at 02:05 PM.
The following 2 users liked this post by xBoostx:
HC Mechanic (03-02-2018),
RobJoy (03-10-2018)
03-02-2018, 01:19 AM
#3
Burning Brakes
Thread Starter
It’s at 12.1:1, the cam is still a fairly small hydraulic and headers are only 1 3/4”, so still a lot on the table. I’m planning to max out the valvetrain next to get revs up to maximum allowable with the stock ECM; 7800 I believe.
Will definately verify any “outside of the box” numbers with another respected dyno; if I end up with those kind of numbers. I’ve been told the RPM dyno is "pretty optomistic.” To be fair to the RPM dyno, I’ll include a dyno graph showing what my car made with a FAST 92 and standard TB which had all been “Spinmonster ported.” I started going to RPM Motors back in 2009, if anyone tells you there’s a better Corvette shop around they are pulling your chain. Your preferred Vette shop would be honored to be on par with RPM, which is now considered Paragon Engines.
03-02-2018, 02:38 AM
#4
Melting Slicks
A low lash solid roller 2 inch primary headers and E85 can help imo.
A few good parts and good fuel can help a long quite a bit.
An ls3 stock block just heads cam cold air intake and headers picked up over 200 tire corrected on both torque and horse power true an automatic still with factory intake manifold and thrortle body done by yours truly.
And yes is lots of fun done rite as opose to done half ahh.
I could't open your pdf but I'll bet your engine sounds like a dream too.
A few good parts and good fuel can help a long quite a bit.
An ls3 stock block just heads cam cold air intake and headers picked up over 200 tire corrected on both torque and horse power true an automatic still with factory intake manifold and thrortle body done by yours truly.
And yes is lots of fun done rite as opose to done half ahh.
I could't open your pdf but I'll bet your engine sounds like a dream too.
The following users liked this post:
HC Mechanic (03-02-2018)
03-02-2018, 03:09 AM
#5
Burning Brakes
Thread Starter
A low lash solid roller 2 inch primary headers and E85 can help imo.
A few good parts and good fuel can help a long quite a bit.
An ls3 stock block just heads cam cold air intake and headers picked up over 200 tire corrected on both torque and horse power true an automatic still with factory intake manifold and thrortle body done by yours truly.
And yes is lots of fun done rite as opose to done half ahh.
I could't open your pdf but I'll bet your engine sounds like a dream too.
A few good parts and good fuel can help a long quite a bit.
An ls3 stock block just heads cam cold air intake and headers picked up over 200 tire corrected on both torque and horse power true an automatic still with factory intake manifold and thrortle body done by yours truly.
And yes is lots of fun done rite as opose to done half ahh.
I could't open your pdf but I'll bet your engine sounds like a dream too.
Very interested to see how your LS3 graph looks.
The following 2 users liked this post by jleews6:
HC Mechanic (03-02-2018),
RobJoy (03-10-2018)
03-02-2018, 08:57 AM
#7
Nice numbers! I agree that a LL solid, E85 and some 2” headers would be the way to go to maximize power output on that combo.
The following users liked this post:
HC Mechanic (03-02-2018)
03-02-2018, 10:00 AM
#8
Melting Slicks
The following users liked this post:
HC Mechanic (03-04-2018)
03-02-2018, 10:35 AM
#9
Burning Brakes
Considering I have a built 402 w/ ported/milled 243's, ported Fast and huge cam and 1 7/8 headers. I can assure you on a normal dyno you are getting nowhere close to 600rwhp sorry just is not happening. My 402 made 526rwhp backed up on 2 different reputable dynos. I tried numerous combinations and probably 4 different cams.
Everyone who has done business with RPM and has gone elsewhere knows there dyno reads ridiculously high. My previous Z06 was a 585rwhp RPM car. First thing I did when purchased was throw it on a well known dyno and guess what.... 530rwhp and we picked up 15rwhp over RPM's tune.
Everyone who has done business with RPM and has gone elsewhere knows there dyno reads ridiculously high. My previous Z06 was a 585rwhp RPM car. First thing I did when purchased was throw it on a well known dyno and guess what.... 530rwhp and we picked up 15rwhp over RPM's tune.
The following users liked this post:
timd38 (04-08-2018)
03-02-2018, 02:00 PM
#10
Burning Brakes
Thread Starter
The only reason I’m running the Klotz vs. E85 is the fact the the closest E85 station is an hour plus away if there’s traffic..
I think Klotz and meth inj. is my most viable option as of right now.
03-02-2018, 03:47 PM
#11
Burning Brakes
Thread Starter
Considering I have a built 402 w/ ported/milled 243's, ported Fast and huge cam and 1 7/8 headers. I can assure you on a normal dyno you are getting nowhere close to 600rwhp sorry just is not happening. My 402 made 526rwhp backed up on 2 different reputable dynos. I tried numerous combinations and probably 4 different cams.
03-02-2018, 10:36 PM
#12
Le Mans Master
Great numbers, I have much love for the little LS2. Funny you mention tuning a 102mm throttle body for the street, try doing that on a 05 ECU. I would also agree with the above comment on adding E85 it’s worth the upgrade in my opinion.
Last edited by Brandon619; 03-02-2018 at 10:38 PM.
The following 2 users liked this post by Brandon619:
HC Mechanic (03-04-2018),
sallen619 (03-08-2018)
03-04-2018, 01:46 PM
#13
Burning Brakes
Thread Starter
03-04-2018, 01:50 PM
#14
Burning Brakes
Thread Starter
Mine is an ‘06, what’s different on the ‘05 ECU?
03-05-2018, 08:30 AM
#15
Le Mans Master
Any more info on this? I'm planning to up my revs to around 74-7600 soon. I just tightened up my valve spring install height hoping that's enough to keep my valves in control. I'm also on the tighter end of my recommended preload for my lifters.
03-05-2018, 11:21 AM
#16
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
Received 1,194 Likes
on
1,053 Posts
St. Jude Donor '15
05 is a totally different ECM, E40 (2005) vs. E38 (2006+)
The following users liked this post:
HC Mechanic (03-05-2018)
03-05-2018, 03:04 PM
#17
Burning Brakes
Thread Starter
What type of lifter/rocker setup are you running?
03-05-2018, 03:16 PM
#18
Burning Brakes
Thread Starter
Good to know, I’ll have to research what the differences are.
In the distant future I’m going to look into an aftermarket ECU. Would like to have a race spec wiring harness didicated to engine management. Would be REALLY nice to have somthing with more control in terms of traction management, trims per gear, and all the future advancements that have been made in the past 12 years; there’s been a lot!
In the distant future I’m going to look into an aftermarket ECU. Would like to have a race spec wiring harness didicated to engine management. Would be REALLY nice to have somthing with more control in terms of traction management, trims per gear, and all the future advancements that have been made in the past 12 years; there’s been a lot!
The following users liked this post:
HC Mechanic (03-06-2018)
03-06-2018, 01:37 AM
#20
Melting Slicks
The following users liked this post:
HC Mechanic (03-06-2018)