Too stroke or not to stroke!?
Your average 403 will make 470-480 in an auto and 500-530 in a stick car. I've heard great things from wcch. If you want a nice driving car that still moves out I would look into a set of ported ls6 heads from wcch or frankenstein, cam motions stealthy stroker cam or similar. You could run magnaflow high flow cats but they tend to burn up when you run them in big cam cars. From my experience, the fuel smell was replaced with a sulfur smell, so I took them off.
if you want something real quiet, see about incorporating a dynomax super turbo muffler into the build.
if you want something real quiet, see about incorporating a dynomax super turbo muffler into the build.
I guess that’s not bad numbers for the auto, I really want to make TQ at a much lower RPM. I thought about using my AI 243’s up top. Too bad the guys at AI don’t answer emails anymore.
TECH Fanatic
Joined: Jan 2017
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Likes: 442
forget them then. There is no magic anymore anyways, most reputable shops got it figured out and will all be withing split hairs of eatchother.
You know I needed to hear that, and that’s what I figured also about shops having the blueprint for my setup, I guess I got comfortable and complacent.
TECH Veteran
Joined: Sep 2014
Posts: 4,893
Likes: 706
From: Mississippi
Updates……So, it’s been a while, I halted the build bc I ended up purchasing and mildly restoring a 66 mustang for my dad and surprised him on fathers day 2021. I wish I woulda ran across a running 67-69 Camaro for the same price and I woulda got him that instead. But he is a ford guy(hey you can’t choose your father!)…nah pops is TBE! ALSO….during the time of the mustang affair I found out I was going to be a dad for the first time, my big girl is almost 9 months old now. But daddy still needs his toys too so until I purchase a 2010+ CTS-V or 2010+ C6 I’m tryna build this ole 408.
I ran across this old thread it’s 65 pages I read the entire thread and this guy built this amazing 403 set up with ported L92 heads and cam specd by WCCCH. The car made 522/488 that got 21 mpg, was quiet and drove like a stock vehicle before he later converted to a 427.
https://ls1tech.com/forums/generatio...b-c-d-e-f.html
His build sounds like what I’ve always wanted especially now bc I wanna have my daughter with me and not have her exposed to all the noise and smelling of fuel like daddy. Guess I’ll have to look into a set of HF cats. Basically if anyone can chime back in and give me more input I’ll be greatly appreciative. AI is still not responding to email, I have two different top end engine setups to choose from and it’s like killing me be bc everyone’s advice here have been really good.
I ran across this old thread it’s 65 pages I read the entire thread and this guy built this amazing 403 set up with ported L92 heads and cam specd by WCCCH. The car made 522/488 that got 21 mpg, was quiet and drove like a stock vehicle before he later converted to a 427.
https://ls1tech.com/forums/generatio...b-c-d-e-f.html
His build sounds like what I’ve always wanted especially now bc I wanna have my daughter with me and not have her exposed to all the noise and smelling of fuel like daddy. Guess I’ll have to look into a set of HF cats. Basically if anyone can chime back in and give me more input I’ll be greatly appreciative. AI is still not responding to email, I have two different top end engine setups to choose from and it’s like killing me be bc everyone’s advice here have been really good.
You can spend money on a 40Xci rotaing and ported L92/LS3 heads and you go be stuck at 500-530 horse or so max. Stroker kits are NOT CHEAP and having L92 heads CNC ported can be costly depending on who the porter may be. Anyway thats option #1... Most of these combos go run 10.7 to 10.9 in the quarter mile at 126 to 127 mph or so in a F body car with a 6 speed.
A 40Xci build with aftermarket cathedrals go put put you at 540 to 550 plus and these combos tend to trap 129 plus mph at the track. However, these combos tend to go 10.6 or faster at the track. The TFS 235s tends to be great on a 40X ci build.
A 6.0 with a aftermarket heads such as TFS 225, PRC 227 or a AFR 225/230 with make the same horsepower as a L92 headed 40Xci setup on the dyno. Most L92 headed 6.0 motors go be stuck around 480 or so. Give or take...Ive seen it happen over and over like clockwork.
Food for thought but facts....
Its a TFS 225 headed (stock bottom end) LS2 on board now making 515 horses or so at the wheel with a cam from LG motorsports. 235 duration cam or so. Bucky/surgy at low speeds i bet but this combo went 10s in a vette. 6 speed car
Its also a LS2 car on board making 495 at the tire with a automatic. PRC heads with a TSP Tsunami Cam.
I can go on and on but there you have it. Hope this helps you out or at least somebody.
I dont have the best advice but i know combos .
You can spend money on a 40Xci rotaing and ported L92/LS3 heads and you go be stuck at 500-530 horse or so max. Stroker kits are NOT CHEAP and having L92 heads CNC ported can be costly depending on who the porter may be. Anyway thats option #1... Most of these combos go run 10.7 to 10.9 in the quarter mile at 126 to 127 mph or so in a F body car with a 6 speed.
A 40Xci build with aftermarket cathedrals go put put you at 540 to 550 plus and these combos tend to trap 129 plus mph at the track. However, these combos tend to go 10.6 or faster at the track. The TFS 235s tends to be great on a 40X ci build.
A 6.0 with a aftermarket heads such as TFS 225, PRC 227 or a AFR 225/230 with make the same horsepower as a L92 headed 40Xci setup on the dyno. Most L92 headed 6.0 motors go be stuck around 480 or so. Give or take...Ive seen it happen over and over like clockwork.
Food for thought but facts....
Its a TFS 225 headed (stock bottom end) LS2 on board now making 515 horses or so at the wheel with a cam from LG motorsports. 235 duration cam or so. Bucky/surgy at low speeds i bet but this combo went 10s in a vette. 6 speed car
Its also a LS2 car on board making 495 at the tire with a automatic. PRC heads with a TSP Tsunami Cam.
I can go on and on but there you have it. Hope this helps you out or at least somebody.
You can spend money on a 40Xci rotaing and ported L92/LS3 heads and you go be stuck at 500-530 horse or so max. Stroker kits are NOT CHEAP and having L92 heads CNC ported can be costly depending on who the porter may be. Anyway thats option #1... Most of these combos go run 10.7 to 10.9 in the quarter mile at 126 to 127 mph or so in a F body car with a 6 speed.
A 40Xci build with aftermarket cathedrals go put put you at 540 to 550 plus and these combos tend to trap 129 plus mph at the track. However, these combos tend to go 10.6 or faster at the track. The TFS 235s tends to be great on a 40X ci build.
A 6.0 with a aftermarket heads such as TFS 225, PRC 227 or a AFR 225/230 with make the same horsepower as a L92 headed 40Xci setup on the dyno. Most L92 headed 6.0 motors go be stuck around 480 or so. Give or take...Ive seen it happen over and over like clockwork.
Food for thought but facts....
Its a TFS 225 headed (stock bottom end) LS2 on board now making 515 horses or so at the wheel with a cam from LG motorsports. 235 duration cam or so. Bucky/surgy at low speeds i bet but this combo went 10s in a vette. 6 speed car
Its also a LS2 car on board making 495 at the tire with a automatic. PRC heads with a TSP Tsunami Cam.
I can go on and on but there you have it. Hope this helps you out or at least somebody.
TECH Veteran
Joined: Sep 2014
Posts: 4,893
Likes: 706
From: Mississippi
Anyway i can speak for him. He had Lingenfelter CNC LS3/PAT G cam on his car. The car was fast and made 535 rwhp but was stuck in the 10.7 to 10.8 e.t range with his best 60ft being a 1.47..... pretty nice budget setup
He wanted to go faster so he ditched the CNC LS3 heads for a TEA TFS 235 setup with a Pat G cam again. The car only made 10 more rwhp or so BUT the car start running 10.3 to 10.4 e.t range at 130 plus with a worse 60ft 1.55
The moral of the story is you can have 2 setups that dyno basically the same but be a complete different animal. Every Reptile is not a Lizard....
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BlackedOut ls1:
I appreciate it Tusky, I’ve read your sticky and various posts from you. I like that idea of getting an aftermarket cathedral head for the low end torque and drivability. I just didn’t budget $2500 for new heads. I’m damn near thinking just go for trial and error, see how my current ported 243 heads workout out with a slightly bigger cam than I’m running currently. Then maybe after a year throw the ported L92’s on with a matched cam and see how I like that. All while budgeting for possible the TFS235’s
I appreciate it Tusky, I’ve read your sticky and various posts from you. I like that idea of getting an aftermarket cathedral head for the low end torque and drivability. I just didn’t budget $2500 for new heads. I’m damn near thinking just go for trial and error, see how my current ported 243 heads workout out with a slightly bigger cam than I’m running currently. Then maybe after a year throw the ported L92’s on with a matched cam and see how I like that. All while budgeting for possible the TFS235’s
When You get the TFS 235 heads you already have a aftermarket intake...if you don't have 1.