408 stroker?

94' Cobra 351 · February 2nd, 2007, 12:35 PM

Couldn't find any previous posts about this. I am on the fence about either stroking my 351w to a 408, or supercharging it. I was concerned with stroking it because I heard the driveability of the car goes down. I also wasn't sure what sort power gains I would see from stroking it. I am really trying to find someone who has a 408 stroker. Any advice at all would be great.

03 R Code · February 2nd, 2007, 02:23 PM

Do both.

Justincredible · February 2nd, 2007, 03:05 PM

Originally Posted by 94' Cobra 351

Couldn't find any previous posts about this. I am on the fence about either stroking my 351w to a 408, or supercharging it. I was concerned with stroking it because I heard the driveability of the car goes down. I also wasn't sure what sort power gains I would see from stroking it. I am really trying to find someone who has a 408 stroker. Any advice at all would be great.

Driveability will not suffer with the 408 if you dont get greedy on the cam selection and have it tuned by a good tuner. (provided you keep the EFI).
With that said...the cost of the supporting hardware will add up quickly to acompany the 408 at a power level comprable to a blown 351.

A supercharger and your existing 351 will yeild more hp for the money spent untill you get into the 600+ hp range.

94' Cobra 351 · February 2nd, 2007, 10:14 PM

what do you mean by supporting software for a 408?

1slo5.0 · February 2nd, 2007, 10:37 PM

Driveability does't suffer from cubic inches. A 408 will drive just fine.

94' Cobra 351 · February 3rd, 2007, 03:03 AM

well i had heard the the extended stroke of the piston causes more friction and wears the block faster, and that it also doesn't rev as high with a longer stroke. any idea what kind of power gain i should see from a 408 stroker?

sleepinggt · February 3rd, 2007, 08:23 AM

351 produces more than enough for everyday fun...if it's for racing the best thing is to get a properly tuned wet kit...weigh's alot less than a s/c or turbo set up

94' Cobra 351 · February 3rd, 2007, 10:47 AM

its not a daily driver, it is going to be my weekend summer car, and i don't want any imports around town showing me up. and i don't want to go the nitrous route, not a big fan.

Justincredible · February 3rd, 2007, 11:08 AM

[quote="94' Cobra 351"]what do you mean by supporting software for a 408?[/quote

I didnt say software...I said hardware. By hardware I refering to the bigger heads, cam, and intake etc. that would be needed to acompany the 408 to let it make the same power as your current 351 with just a blower bolted onto it.

Dont get me wrong...Im all about bigger cubes...but to answer your question...the blower will offer you the best hp per dollar ratio on a pump gas engine.

94' Cobra 351 · February 3rd, 2007, 11:13 AM

i have GT40 heads, and a 292-292 512 max cam, you don't think they will support the 408? and i know if i go with a blower i have to lower the compression, what are different ways to go about doing that?

1slo5.0 · February 3rd, 2007, 01:24 PM

Originally Posted by 94' Cobra 351

well i had heard the the extended stroke of the piston causes more friction and wears the block faster, and that it also doesn't rev as high with a longer stroke. any idea what kind of power gain i should see from a 408 stroker?

No the block doesn't wear faster and the stroke has nothing to do with the engine reving. As long as the heads can keep up and has the proper cam, the engine will have no problem making power at high rpm. I have a 4.100 stroke and spin over 8000 rpm.

February 2nd, 2007, 12:35 PM	#1
94' Cobra 351 Regular Join Date: Dec 2006 Posts: 478 iTrader: 0 reviews	408 stroker? Couldn't find any previous posts about this. I am on the fence about either stroking my 351w to a 408, or supercharging it. I was concerned with stroking it because I heard the driveability of the car goes down. I also wasn't sure what sort power gains I would see from stroking it. I am really trying to find someone who has a 408 stroker. Any advice at all would be great.

February 2nd, 2007, 10:37 PM	#5
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	Driveability does't suffer from cubic inches. A 408 will drive just fine. __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

February 3rd, 2007, 11:08 AM	#9
Justincredible Enthusiast Join Date: Sep 2006 Location: Ky Posts: 523 iTrader: 0 reviews	[quote="94' Cobra 351"]what do you mean by supporting software for a 408?[/quote I didnt say software...I said hardware. By hardware I refering to the bigger heads, cam, and intake etc. that would be needed to acompany the 408 to let it make the same power as your current 351 with just a blower bolted onto it. Dont get me wrong...Im all about bigger cubes...but to answer your question...the blower will offer you the best hp per dollar ratio on a pump gas engine. __________________ 9.91@ 134mph 1/4 - 6.17@ 109mph 1/8th - 1.33 60' - Stock ECU & Stock Suspension......and getting faster . BIVENS RACE CARS FTMFW!!!

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February 2nd, 2007, 02:23 PM	#2
03 R Code MM Fanatic unstoppable @ speed of light Join Date: Jul 2006 Location: Knees deep in dat ass Posts: 3,103 iTrader: 0 reviews	Do both.

February 2nd, 2007, 10:14 PM	#4
94' Cobra 351 Regular Join Date: Dec 2006 Posts: 478 iTrader: 0 reviews	what do you mean by supporting software for a 408?

February 3rd, 2007, 03:03 AM	#6
94' Cobra 351 Regular Join Date: Dec 2006 Posts: 478 iTrader: 0 reviews	well i had heard the the extended stroke of the piston causes more friction and wears the block faster, and that it also doesn't rev as high with a longer stroke. any idea what kind of power gain i should see from a 408 stroker?

February 3rd, 2007, 08:23 AM	#7
sleepinggt Regular Join Date: Dec 2006 Posts: 95 iTrader: 0 reviews	351 produces more than enough for everyday fun...if it's for racing the best thing is to get a properly tuned wet kit...weigh's alot less than a s/c or turbo set up

February 3rd, 2007, 10:47 AM	#8
94' Cobra 351 Regular Join Date: Dec 2006 Posts: 478 iTrader: 0 reviews	its not a daily driver, it is going to be my weekend summer car, and i don't want any imports around town showing me up. and i don't want to go the nitrous route, not a big fan.

February 3rd, 2007, 11:13 AM	#10
94' Cobra 351 Regular Join Date: Dec 2006 Posts: 478 iTrader: 0 reviews	i have GT40 heads, and a 292-292 512 max cam, you don't think they will support the 408? and i know if i go with a blower i have to lower the compression, what are different ways to go about doing that?

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408 stroker?

408 stroker?

Re: 408 stroker?