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Bortous Dude would need to Shrink the exhaust valve so add about ..... to the price. And what Darth said.... would recommend Ls3 head. Ls7 but you don't need them
ET heads are Mast heads... typically there isn't anything out < Honestly out doing Mast OTB.
Last edited by Smokey B; Jan 17, 2020 at 10:03 AM.
I have lots of recipes in my personal cookbook. I do have a stock cube section in there as well.
Most of those cars that hauls *** on stock bottom ends are very lightweight cars run 11.1 or faster. The secret i tend to see with making them cars fast are the weight and the suspension.
I personally think guys that are running 6 speeds and that are serious about their e.t should have double adjustables on the front and the back. The 60ft is critical. A stiff wall slick does magic as well.
I dont have your car in there.... most cars I have notes on are F body cars which are heavier than Vettes in most cases.
However, i do have Hio car and SLP IROC car in there. Both of those cars are fairly light, run 10s, and run stock cams in a LS6 motor.
I pay more attention to the stroker motors cause they tend to be in some cars thats not exactly lightweight but they get the job done.
I i dont pay attention to those 400 plus cube motors/cars that run 11s.
Anyway, one of my favorite cars is a 2000 Z28 car that weighs 3750 lbs with the driver. Combo? LQ block 402ci with AFR 205s by Mamo and a 92mm fast intake by Mamo. Pat G 240s cam. Run 10.80 @ 129 mph on a 17" hoosier QTP on vette wheels. Car pulls the 17 inch tires about 4 inches off the ground. Very cool ride.
So what you are saying is...
The lighter the car...
The better the suspension is set up...
And the better 60 ft you have...
The faster the car will be?
So what you are saying is...
The lighter the car...
The better the suspension is set up...
And the better 60 ft you have...
The faster the car will be?
Holy hell...I never made the connection....
I'll be starting a thread soon. Its alot of 500 rwhp cars that run the same e.t as a 430 rwhp car. Weight and suspension plays a bigger role than you think. 500 rwhp is great but you have to put that power to thr ground.
I'll be starting a thread soon. Its alot of 500 rwhp cars that run the same e.t as a 430 rwhp car. Weight and suspension plays a bigger role than you think. 500 rwhp is great but you have to put that power to thr ground.
My Miata will be pushing 500 rwhp at 2400# soon, and may run the same ET as a bunch of heavier 400 rwhp cars. It's more fun than a barrel full of monkeys, but not much traction. :-)
I'll be starting a thread soon. Its alot of 500 rwhp cars that run the same e.t as a 430 rwhp car. Weight and suspension plays a bigger role than you think. 500 rwhp is great but you have to put that power to thr ground.
Texas Speed went 8.9's in the 1/4 mile N/A with their prc small bore ls7 heads on a LS3 in a 5th gen Camaro which isn't a light car. They were trying to prove a point. I'm sure they must have hand worked the heads to maximum effort to achieve that and the cam idled at 1200rpm, but as those heads come out the box I think they would do more than ok for what you want and will fit on your 408 as is.
I bought my small bore LS7 heads and T&D rockers from an ex 24hr Daytona nascar when they came along, because what I have seen over the years from some head/cam factory LS7 corvettes both power and 1/4 mile numbers, I don't think a cathedral can really come close to good ls7 heads for all out performance. Some trickflow 245's have, there's a past member on here went 8.6's n/a in the 1/4 mile using them, but that build had 30k usd in just the engine which he said himself as I saw his car for sale on racingjunk.com a while back. It was a total max effort deal.
Raised port heads like LS7's don't lose mid range torque if they're not hogged out too large, they just make more power/torque everywhere due to better cylinder fill. Look at what some SB2.2 heads SBC's are doing, I saw a Torana for sale on gumtree just a few days ago, 400 something ci with SB2 heads, pump gas, single plane with dominator carb, 860hp engine dyno'd. And there's been others do the same and run 8 second 1/4 miles naturally aspirated Those heads the ports are crazy tall (pic below of raw castings). But a good effort 400+ci LS with ls7 heads can also make similar power with single plane intake like the CID. Maybe not quite 860 on pump gas, but low 800 is doable. I'm too far into LS parts now so i'll stick with it, and there's always the turbo option when you decide you want stupid power.
The prc ls7 heads were right out of the box. No other modifications done.
So what you are saying is...
The lighter the car...
The better the suspension is set up...
And the better 60 ft you have...
The faster the car will be?
The LS7 head is the best one to use by the looks of things.
Almost everyone agrees with this and time slips listed also shows these heads are the bomb.
Who makes the best LS7 head?
I am thinking maybe trickflows?
The LS7 head is the best one to use by the looks of things.
Almost everyone agrees with this and time slips listed also shows these heads are the bomb.
Who makes the best LS7 head?
I am thinking maybe trickflows?
I just created a helpful thread. It may just help you out.
Bortous:
Trick Flow is the best Ls7 casting....BS x Infinity. Brodix is the Best bang for the dollar with options.
Hio:
Lsx DR heads are no longer sold..what's out is it. All Pro has a C5r head and Mast also with the STR heads. One company makes a billet Lsx DR head.
The whole DR program is gone engine also... maybe not the heads...Mast are cheaper BTW and basically the same head.... 302 cc LsxCT would be on par with the small bore STR and Lsx 315cc DR for the STR big bore..GG answered a question 4 me yrs ago about using the LSx DR/CT head on a small bore. CT has a closer valve spacing VS the DR
Man that sucks about lsx dr heads. They were still listed in the gmpp catalog last year. It was likely the best head on the market for all out builds.
Only head out the box I know of that kept up was the edelbrock lsr. That is the casting that RFD got 500 cfm out of. Good luck fitting it though. The top of the intake ports is higher than the valve cover deck for stock ls7 casting form factor. The head deck to deck is at least an inch taller. Few guys I have heard call it the big johnson head.
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