When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So this is how I know for certain that it is the heads and cam holding me back. The car made 335rwhp/347rwtq with long tube headers and xpipe and tune through factory mufflers no cats and LslS1 intake and factory TB.
Made 335rwhp 355rwtq with LS3 intake,90mm TB through factory mufflers.
Made 335 rwhp 355rwtq with LS3 intake and 90mm TB/ no mufflers.
So the next step is....242 heads unported and decked .015 with .040 thick Comet head gaskets for a 11.1 compression ratio, .670" Valve springs, LS3 Intake and 90mm TB, 25% Powerbond Damper damper and a
25-TSP233239-112 - Texas Speed & Performance
233/239 Camshaft: 233/239, .600/.600, 112 LSA
Electric waterpump and Tune of course on 100LL Fuel.
We then go with a duel friction clutch by McLeod and a 200 shot.
If it holds we are going to a 2 stage 300 shot.
Seems like a useless mod with a lot of finnangling for the gains ~ for a stock cubed engine with bolt ons . It's been said many times that for a mild motor the intake isn't really the bottleneck on a bolt on corvette
I ran across your thread while searching for info on these adapters. There's a machinist on the LS forums that makes and sells these adapters.
As you eluded to in an earlier post, he came up with the adapters as a solution to adapt LSA blowers to cathedral port applications. Using these adapters, the air charge still has a fairly straight path from the LSA blower to the cathedral intake port. However, he said he didn't think the adapters would work particularly well in naturally aspirated applications.
Because of the port misalignment, the intake charge leaving an LS3 intake has to change directions to enter the cathedral port. I have an LS3 intake and was hoping this might be an inexpensive alternative to running a FAST intake. I'm still hoping you get your desired results. Thanks for sharing the info you've provided.
I noticed yes at the head side of the port it looks like you can port it to match....as far as change direction with the airflow and such....how many times do you think the air changes before it gets to the cylinder? I am starting the head and cam install Wednesday. I haven't had a day off until now. Let's see what happens.
Seems like a useless mod with a lot of finnangling for the gains ~ for a stock cubed engine with bolt ons . It's been said many times that for a mild motor the intake isn't really the bottleneck on a bolt on corvette
I have heard people on both sides of that coin.
It seems like the people that claim gains from a bigger than LS6 intake have larger throttle bodies, MAF and duct work as well. There is a thread in the performance section about people making big Hp with bolt-on's (stock cam and heads).
The others seem to have a bottle neck somewhere.
I think some folks get confused thinking that each part adds a specific ammount of Hp. It doesn't necessarily work that way. adding a intake only wont help a stock LS1 because it is like widening a road that isn't that busy. It doesn't help flow.
OK so the results are in.
The red is the 335rwhp 347rwtq Headers,Xpipe and tune only through Stock mufflers and stock LS1 Intake.
The Green Line is the new number which is 334rwhp/355 rwtq. With LS3 intake and retuned.
As you can see it started making Horsepower and Torque all the way across the board much sooner and held it longer until the camshaft or heads stopped flowing and kept it from making any more.
Now it wasn't my intention to make a lot of Horsepower with this intake on the stock LS1 heads and stock LS1 cam...only to see what the difference would be. Now that I have the results the next step will be on Tuesday,that will be pull the LS1 heads off and go to a set of 243 stock heads unported and a decent sized cam with the LS3 intake and get the results.
Then port the LS2 heads and see the results. Port the TB then get the results....underdrive...and electric waterpump and get the results all with the LS3 intake.
Of course I could have went with a LS6 Intake but that's boring....everyone has already done that.
Need to try something different.
I'm aiming for 430-450rwhp with the Stock 243 Heads and LS3 Intake with Cam Underdrive with Mufflers removed. Let's see how I do.
OK so here are the temporary results. It got late so all we had time was for a base tune @WoT.
This pull was with 23degrees timing.
Mods. LS1 shortblock. Unported milled LS2 Heads, thijner cometic head gaskets LS3 Intake,LS2 TB. Long Tubes,Cam,CAI,Underdeveloped Damper,Factory Mufflers with Electric Cutouts. McLeod Stage stage 3 twin disc.
404 rwhp@5800rpm and 392 rwhtq@ 4,600
Rev limiter is set at 5900 and it's still making power with no knock car heat soaked and 88 degree outside Temp.
Since these adapters work.....there is no reason why an LSA blower won't bolt up to our cars.
More people should be talking about this! This is the route I would prefer to go myself with a conservative price tag & conservative power numbers compared to the $6k+ big boys.
Coming from imports my whole life, I know a thing or two about turbo setups but not about superchargers. Would you just need the blower, these adapters, belt, and a tune?
2020 Corvette of the Year Finalist (performance mods)
C5 of Year Winner (performance mods) 2019
I would be more concerned about the belt system, it is completely different than a c5 and I'm not sure it will even bolt up and work not to mention the added cost... a centrifugal makes more sense to me but if you prefer the top mount blowers there are plenty of companies that make them for our cars... I haven't really looked into it though but bolting on an lsa blower and actually making it work is a different story
Didn't the Cleetus McFarland do one one his Leroy Vette?
Originally Posted by Stephen Meredith
More people should be
talking about this! This is the route I would prefer to go myself with a conservative price tag & conservative power numbers compared to the $6k+ big boys.
Coming from imports my whole life, I know a thing or two about turbo setups but not about superchargers. Would you just need the blower, these adapters, belt, and a tune?
Didn't the Cleetus McFarland do one one his Leroy Vette?
Yeah he did. The only problem I see with that setup is that I may stick out 2-4 inches past the hood. That's the route I plan on going if I can find a blower for a decent deal. It still cost about 3k for all the parts depending on what kind of deals you get.
So the car is now equiped with a 200 shot of Nitrous. Let's see what she puts down on the Dyno.
A brand new C7Z06 called me out for a race and I pulled away pretty good from him on the 200 shot. Once the results are in on the Dyno from the 200 shot we are putting a 2 stage plate kit in and spraying a 300 shot. Let's see what the LS1 can handle.
05-27-2017, 04:17 PM
