Supercharge or Stroker?

[cmc6070]

As a follow-up to this, these are kind of the 2 routes I'm really leaning towards now...My question being, if I wanted to save some money and use it, will the Cobra intake flow enough for either/both of these combos? And do you think there'd be a big difference in streetability? I should add that I LOOVE low-end torque (my DD is a 850 lb/ft Cummins inline 6) and am not really interested in revving my engine up to 7k or so....

#1 - Keep it N/A and go stroker w/
-347/331 shortblock
- AFR 185 heads

#2 - Supercharge and go
- 306 shortblock
- Eddy E-street 170 heads
- Paxton sn2000 SC

Also, allow me to explain why I'm leaning towards the E-Street's if I go SC. While I know there are better, higher revving heads I could choose (AFR 165's or TW170's). Rebuilding the Paxton will be approx $1000 (with cooler and improved impeller) on top of the price of the new heads, so I'm looking at the Eddy's as a compromise of power/price since they will have the SC "helping" them along in the power dept. Also, the SC is the relatively low boost (6-8 psi) system and not really designed to be revved much past 5500-5700 RPM's which matches up with the E-street's recommendations.

Also, any ideas what kind of power I'd be looking at with these combos (and the other required supporting mods)? I know I saw somebody on here (can't remember who) posted they were making around 285 RWHP with the 306/Cobra/E-street combo, so I'm thinking throwing the 5-8 psi on top of that should keep things interesting....

 

[Cobra912]

without reading the thread again, I'm gonna say do neither 1 or 2. Do a stock rebuild with anice H/C/I combo maybe the TFS kit, save a ton of cash, sell the bad blowers as it's not worth it to repair IMO and that's a lot of cash, buy yourself a nice paxton 1220SL or Vortech V3 and call it a day. Lots of power, very streetable, drives like stock and you'll get the power you're looking for.

 

[sgtskip]

Blower

I've always loved power adders, either Turbo, or a Blower.... NO Nitrous

 

[bgoins]

Anyone considering E-Street heads should read this.
WARNING: Edelbrock E-Street Heads - Ford Mustang Forums : Corral.net Mustang Forum

 

[1bad67sbf]

that may have been a bad batch of dampeners or something because i dont see alot of stories of them failing, just alot of people saying they have bad valvetrain. maybe they do but i would think if the heads are good other than the valvetrain edelbrock would correct the problem with a better set of springs and retainers.

 

[bgoins]

Could be, but if it were me I'd cough up the extra cash and get some heads with quality parts through and through

 

[1bad67sbf]

Could be, but if it were me I'd cough up the extra cash and get some heads with quality parts through and through

you may want to read some of the updates to the corral link

 

[bgoins]

Good call. Saw what Ed Curtis wrote. It is pretty interesting. I guess the moral of the story is run ur setup by either the manufacturer and/or an expert before buying anything. This is one of the reasons I'm saving for a Trick Flow Top End Kit.

 

[FastDriver]

I think you're going to be in the 350-400rwhp range with either setup. It could be slightly better for either, and unlikely to be any worse, but it still depends on the combination of parts. I wouldn't recommend the Cobra on the n/a 331 or 347, and unless you're doing something special and really know why you're doing it, stick with the 347 if you go stroker. Otherwise, you're just giving up free power. The air-flow in volume is going to be greater with the stroker, and the cobra won't keep up without extensive porting. For that combo, you're better served with a Systemax or Eddy RPM II. I've always been told that the Eddy intakes match up to the AFRs a little better.

I think you're going to end up spending more on the stroker motor, and as I initially mentioned, you might be better served to go the blower route since you already have the parts, but then again I wouldn't spend $1k on a rebuild for those blowers if that's really what it costs. You can get a nicer used blower than the one you have for that price.

As long as you get the tune right, Driveability comes down to your cam. If you go too aggressive, it will be less driveable. Nothing will be more driveable than the stock cam with a blower on a stock discplacement motor, but you'd also be leaving power on the table. Neither the displacement increase, nor the top-end parts installed determines or significantly affects driveability on their own.