351 to 427 stroker kit?

Dominik · #1 (**permalink**) 08-10-2002, 01:09 PM

Dear FORD fans,

please tell me: is there a 351 to 427 stroker kit, and who sells it?
I like to have a "427" Cobra!
You know, it's available for Chevrolet since ages. (4.125" bore, 4" stroke)

Thanks,

Dominik, Cape Town

cobra fever · #2 (**permalink**) 08-10-2002, 01:19 PM

Coast High Performance in L.A sells this strokers I'll try to get the phone number. House of Cobras has a yellow Superformance with this engine, but never been in it. I would prefer the 418 stroker that Dean at HOC is famous for.

SwissCobra · #3 (**permalink**) 08-10-2002, 01:51 PM

Dominik,

Good to hear that Cobras can also be found in South Africa. I heard that there is a kit car manufacturer as well (Kit Car Centre PTY). Coast High Performance - as mentioned by cobra fever - offers excellent engines. Good value for money - I think.

http://www.coasthigh.com/

Best regards,

Dominik · #4 (**permalink**) 08-11-2002, 12:40 AM

Thanks guys,

I check out the site later.

Walter,
there are three manufacturers as far as I know: KCC in Johannesburg, Shamrock in Cape Town and sure enough Superformance in Port Elizabeth, as well as CAV who are building an excellent GT 40in CapeTown.

www.cav.co.za

Cheers,

Dominik

Jack21 · #5 (**permalink**) 08-11-2002, 11:10 AM

351W to 427W uses 4.030" bore, and 4.17" stroke. A number of companies offer this. Coast HP, Pacific Automotive Warehouse (PAW), DSS, etc., etc.

Another combination is a 4.125 bore, 4.00 stroke using an SVO block.

351C 4V heads should wake this motor up. Australian 351C 3V aluminum heads should also.

SwissCobra · #6 (**permalink**) 08-11-2002, 11:33 AM

Is a 351W stroked to 427W still a small block or is it a big block - stupid question I know but I'm not yet so familiar with the differencies.

Regards,

Dominik · #7 (**permalink**) 08-11-2002, 11:02 PM

Thanks Jack!

Walter, no it is not. That is purelyblock related.
Small Böock and Big Block are physically different blocks, the big one heavier.

That is why I want the lighter small block with big displacement.

I am not too familiar with the various FORD blocks, but it very obvious withthe Chevy.

Chevy SB ranged from (the most common, only) 283 cui to 400 cui, the big one from 396! to 454, now 502, with a very rare piece of 496 cui for Can-Am in the 70s.
Which I had in my last Cobra, BTW...

But now I switch to FORD: the analogy goes like this: 260 to 400 for SB, 390 to 460 for the big one, where the well known 427/428 feature a lighter block than the 460 ...

Best regards,

Dominik

750hp · #8 (**permalink**) 08-12-2002, 04:46 AM

I think you should do some research about these big cube strokers. Many people seem happy with these low-revving, torquey small blocks, but others want extra cubes without sacrificing their rod length/stroke ratio. Before Andy Dunn gets on here with all his wit and wisdom as it relates to not only CHP's 427 but why he also subsequently chose a smaller displacement motor, have a read of this relevant page of his massively entertaining website http://www.cobralads.com/butcher39.html

rlearp · #9 (**permalink**) 08-12-2002, 07:10 AM

Domink,

More like this:

Ford SB 260 to about 355 (0.040 not recommended)

Ford SB Windsor 351 to 427

Ford BB (385) 429 to 540 with 514 being more common limit

Ron

Dominik · #10 (**permalink**) 08-12-2002, 11:14 AM

Thanks,
Craig.
I visit Andy's site as often as I need a good laugh!

Thanks, Ron.

Dominik

niles · #11 (**permalink**) 08-15-2002, 10:23 AM

Dominic:

Stroking to 427 was orginally my goal also.

But researching it I found that the answer lies in what you intend to do with engine. The 427 is fine IF, you want a street/rod type motor with tire smoking torque only. Reliablity, life and oil usage will be higher because of the oil ring, pin issue.
If you want to do track events and run sustained higher rpm it's a poor combination. The rod ratio are poor and piston speeds are nearing the safe limit at about 6000 rpm. This combo is a torquer and is better suited for a 3500 lb Tang. Cobra are so light, they dont need extra torque. For all around performance we want to trade some torque for Hp and go with combination that breaths better and turns up with out exceeding the critical piston speed issue.

gn

Jeb · #12 (**permalink**) 08-15-2002, 11:45 AM

I would suggest the 4.125 FRPP block with a 4" crank which you could use with 6.2" rods and still have a 1.25" compression height which should be plenty to keep the pin out of the oil ring and leave you with a 1.57 rod ratio which isn't too bad, if not actually desirable for higher rpm usage.

CCX33911 · #13 (**permalink**) 08-15-2002, 03:52 PM

I was thinking of the 4.125 bore and 4" stroke in a Dart block as a combo also.

Dominik · #14 (**permalink**) 08-16-2002, 01:12 AM

thanks for all your input!

niles,
I like engines with more torque than rev potential, although the typical Cobra is too light for a lot of torque. meaning the tires smoke all day.

I am less interested in track events at the moment and appreciate your comment very much.

keep your 427 a 427, that's the basic idea, but without the heavy block.

dominik, cape town