C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

C2 Motor Transplant

Thread Tools
 
Search this Thread
 
Old 03-27-2015, 05:26 PM
  #21  
tebok
Instructor
Thread Starter
 
tebok's Avatar
 
Member Since: Dec 2009
Location: Denver CO
Posts: 162
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by 65tripleblack
Unimpressive flow numbers! I ported a set of double humps and got them to flow 255 @ .5" valve lift. CNC ported (205cc) Pro Filers will flow 280 @ .5" and 295 @ .7".

With a 406 cu-in engine, you should be looking at 250-260 0.050" durations for a "3/4" race build, and 270-280 for a "full race" build. In either case, you want at least .600" intake valve lift to take advantage of the displacement. Also, yout 4.125" bore will benefit tremendously with a 2.05 or 2.08" intake valve.

I agree that a screamer would be better for your intended use. Consider building a 377 cu-in engine. 4.125" bore and 3.5" stroke. Use a set of 210cc aluminum heads with the cam and flow specs that I indicated and you'll be happier than a pig in ****!!!!

Good input.

I was actually considering doing a 377 cu-in mock Grand Sport motor. It would have had cross-ram fuel injection that would fit just under the stock hood. The price ran up really quick on the cross-ram so I let that thought go. Webers would be cool, but the tuning could be a nightmare and I believe they wouldn't fit under the hood. All that being said, it doesn't meat a 377 should be left out of consideration.

Last edited by vettebuyer6369; 03-27-2015 at 06:19 PM. Reason: edited quote
Old 03-27-2015, 05:41 PM
  #22  
MikeM
Team Owner
 
MikeM's Avatar
 
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes on 1,398 Posts

Default

If you live in the mountains, I wouldn't worry too much about a "screamer". I've been to Denver once and if you live East of there, maybe you want a flat land engine. If you live in Denver or west of there, don't think so.

Go for the cubes, forget the hi-flo heads and the screamer camshafts. You did say you wanted a driver type experience, didn't you?
Old 03-27-2015, 06:53 PM
  #23  
Crunch527
Drifting
 
Crunch527's Avatar
 
Member Since: Mar 2011
Location: Iowa
Posts: 1,379
Received 175 Likes on 111 Posts

Default

HMMMM...that is a ton of motor for the price...about the best I have seen. I could bolt that it in one day and be back on the road.

I was looking at Shafiroff Racing and they are spendy...they build some nice stuff too...with engines, you get what you pay for.

Anyway, I like the Skip White 406 you are considering...seems to have good parts...that thing will yank your 64 around no problem...those other motors have to spin 8K to make power...the Skip White 406 will suck your kidneys through the back of the seat at 3500RPMs...

I have a 450hp 383 that is fun...but I'm always looking to do something different and that 406 would easily fit the bill.

Oh, that 406 has a Air Gap intake...not sure it will fit under a stock hood? I run a stinger on my 67.

I run a Dewitts w/ fan and never have a problem...I bet you have a blockage in your block...that 406 won't overheat with that Dewitts setup.

I say the 406 is a good choice. Let is know what you decide.

Cheers,

Frank
Old 03-27-2015, 06:59 PM
  #24  
MikeM
Team Owner
 
MikeM's Avatar
 
Member Since: Mar 2003
Location: Greenville, Indiana
Posts: 26,118
Received 1,843 Likes on 1,398 Posts

Default

Originally Posted by Crunch527
HMMMM...that is a ton of motor for the price...about the best I have seen.

Anyway, I like the Skip White 406 you are considering...seems to have good parts...that thing will yank your 64 around no problem...those other motors have to spin 8K to make power...the Skip White 406 will suck your kidneys through the back of the seat at 3500RPMs...

Frank
exactly!
Old 03-27-2015, 10:57 PM
  #25  
SI67
Melting Slicks
 
SI67's Avatar
 
Member Since: Apr 2006
Location: Sunnyvale CA
Posts: 2,324
Received 60 Likes on 52 Posts

Default Would a Ramjet 350 fit?

Originally Posted by OC-1
Ramjet 350
Will a Ramjet 350 fit under a small-block hood?

Steve
Old 03-27-2015, 11:02 PM
  #26  
SI67
Melting Slicks
 
SI67's Avatar
 
Member Since: Apr 2006
Location: Sunnyvale CA
Posts: 2,324
Received 60 Likes on 52 Posts

Default

Originally Posted by haccpguy
This would be a fun power plant for your car:
http://www.crateenginedepot.com/ZZ38...P9982C944.aspx

Or even the ZZ5 would work well.
Will the height of the included intake manifolds on either of these engines be an issue with a small-block hood?

Steve
Old 03-27-2015, 11:48 PM
  #27  
Sky65
Le Mans Master

Support Corvetteforum!
 
Sky65's Avatar
 
Member Since: Nov 2003
Location: Maryland
Posts: 5,657
Received 613 Likes on 368 Posts
St. Jude Donor '05, '09, '15

Default tebok

http://www.skipwhiteperformance.com/...Item=406_STG_3

That does look like a really nice engine. Specs are great as well. Better have some really sticky, meaty tires though. My little 355 will smoke the 275 Nittos on 9" rims, on a clutch out roll, to the 6200 rev limiter with no problem. Once the tires are loose 565 HP or 425 HP what difference does it make? Big HP is great for bragging rights but what do with it on a car with stock or near stock tires? If you are going to part time drag race it with slicks or drag radials that is a different story but that is not what I took from your first post.


Tom

Last edited by Sky65; 03-27-2015 at 11:59 PM.
Old 03-27-2015, 11:56 PM
  #28  
skids
Drifting
 
skids's Avatar
 
Member Since: Jul 2004
Location: Wi
Posts: 1,506
Received 153 Likes on 110 Posts

Default

www.smedingperformance.com

You'll be happy with whatever you pick
Old 03-28-2015, 12:17 AM
  #29  
Westlotorn
Le Mans Master
Support Corvetteforum!
 
Westlotorn's Avatar
 
Member Since: Feb 2008
Location: Folsom CA
Posts: 5,685
Received 1,274 Likes on 815 Posts

Default

High winding engines are fun but keep in mind the stress on the rods, pistons and crank goes way up between 6,000 and 8,000 RPM. If you want to go that way be prepared to build a bullet proof short block and it will be expensive. A true Forged Crankshaft, A good set of Rods and lightweight pistons are all available but the cost goes way up.
A good crankshaft can be $.3,500 from Callies. A good set of rods would be $600.
I know you can get the Cheap knock offs for far less but if you consider 8,000 your goal build for it. The Valves and Valve springs would also need an upgrade to run that high. I think you could go to 6,500 RPM for less than half the cost of a reliable 8,000 RPM monster.
High RPM engines do make a cool sound and give you a lot of range in each gear.
Let us know what direction you end up choosing.
Old 03-28-2015, 12:42 AM
  #30  
LouieM
Race Director
 
LouieM's Avatar
 
Member Since: Mar 2002
Location: NorCal
Posts: 13,354
Received 3,039 Likes on 1,252 Posts

Default

A big-inch SB with lots of low end torque is definitely the way to go for most uses. 377 or 406 will be enough to overwhelm any street tires in midyear widths.
Old 03-28-2015, 03:59 AM
  #31  
Revfan
Safety Car
 
Revfan's Avatar
 
Member Since: May 2012
Location: APO AE
Posts: 3,886
Received 171 Likes on 120 Posts

Default

I think I'd go with a combo of crate motor and TKO600...
Old 03-28-2015, 05:13 AM
  #32  
haccpguy
54 Vette Rod
Support Corvetteforum!
 
haccpguy's Avatar
 
Member Since: Aug 1999
Location: Orlando/Sebastian FL
Posts: 1,000
Received 7 Likes on 7 Posts

Default

Originally Posted by SI67
Will the height of the included intake manifolds on either of these engines be an issue with a small-block hood?

Steve
Using the dual plane manifold should give the needed clearance.
Old 03-28-2015, 08:03 AM
  #33  
MarkC
Melting Slicks

Support Corvetteforum!
 
MarkC's Avatar
 
Member Since: Apr 2009
Location: Virginia Beach VA
Posts: 2,475
Received 574 Likes on 321 Posts
C2 of the Year Finalist - Modified 2020
C2 of Year Finalist (performance mods) 2019

Default

Here's my two cents. First off, the car was not designed for that much power and you will have to address the clutch, shafts, rear gear, tires and wheels, cooling and brakes. You need to increase your budget to $20,000 with this engine. I personally like the engine but I would tone it down to 450 hp at the crank. The stock parts I have listed above will like this power level. If you are going to stay with a 4 speed trans, a big 406 with a 3.08 rear gear, M20 will make a nice set up. If your rear gear is 3.55 or higher you need a 5 or 6 speed.

Have you driven a car with this kind of power on skinny tires? There will be very poor traction and it gets worst with colder temps. I have a C6 Z06 with 502 rwhp. The tires on the rear are 12 inches wide. Traction is a serious problem at this power level.

Do your research on this and good luck. Keep us posted on your selection.
Old 03-29-2015, 05:55 AM
  #34  
Crunch527
Drifting
 
Crunch527's Avatar
 
Member Since: Mar 2011
Location: Iowa
Posts: 1,379
Received 175 Likes on 111 Posts

Default

I disagree that he needs $20K...I didn't hear him say he was road racing or wanting to do 4000+RPM launches with slicks...if anything, put in a 11.5 inch clutch/flywheel and scatter shield, go to solid spicer u-joints and that is about it. The rear housing/carrier will be fine...the car won't hook up anyway...if the rear housing breaks, oh well...they are cheap...go get another one...bolt in and go...I have had 550+ hp small blocks and my car did fine.

He is already running a Dewitts rad w/ elec fan...same setup I have...it will cool that 406 no problem.

I do like the idea your idea of adding a TKO600. I run a TKO600...but the Muncie will live behind the 406 no problem.

If the brakes are in good working order, they are fine too. Discs would be better but not a requirement.

So with just the motor, maybe add another $1K for bigger clutch/flywheel/scatter shield/spicer ujoints. He can do this for $8K.

Worst case, assuming he buys 5speed/clutch/ujoints/scattershield, he's out approx $11,500 - $12,000. Assuming he does his own work (I do).

Whats the other $8K for?

Frank
Old 03-29-2015, 06:55 AM
  #35  
MarkC
Melting Slicks

Support Corvetteforum!
 
MarkC's Avatar
 
Member Since: Apr 2009
Location: Virginia Beach VA
Posts: 2,475
Received 574 Likes on 321 Posts
C2 of the Year Finalist - Modified 2020
C2 of Year Finalist (performance mods) 2019

Default

Frank, I was looking at it from a full Resto mod point of view using a stock frame. IMO, I just can't see increasing the hp to nearly double of what he has now and leaving the stock trans, shafts and rear gear that is 50 years old. Once you add a new exhaust ( 3 inch), respectable tires and wheels, disc brakes, control arms, heavier rear gear and shafts I doubt you will have much left out of 20k. Sure you can drop that kind of power in the car and leave every thing else stock but I would never do that. We have an honest difference of opinion.

It appears from your avatar that you are a duck hunter. Where do you hunt? I have hunted ducks in the Northern neck, Eastern Shore, Back Bay and Northeast NC. I have about given it up now, but in my earlier years I truely loved it.

Also, if you do any car shows, you should consider the Williamsburg Corvette Show. It is the best show that I have been to in the state. It is at the Williamsburg Winery around Memorial Day . I would like to meet you.
Old 03-29-2015, 10:08 AM
  #36  
tebok
Instructor
Thread Starter
 
tebok's Avatar
 
Member Since: Dec 2009
Location: Denver CO
Posts: 162
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Sky65
http://www.skipwhiteperformance.com/...Item=406_STG_3

That does look like a really nice engine. Specs are great as well. Better have some really sticky, meaty tires though. My little 355 will smoke the 275 Nittos on 9" rims, on a clutch out roll, to the 6200 rev limiter with no problem. Once the tires are loose 565 HP or 425 HP what difference does it make? Big HP is great for bragging rights but what do with it on a car with stock or near stock tires? If you are going to part time drag race it with slicks or drag radials that is a different story but that is not what I took from your first post.


Tom
Well said Tom.
Old 03-29-2015, 10:11 AM
  #37  
tebok
Instructor
Thread Starter
 
tebok's Avatar
 
Member Since: Dec 2009
Location: Denver CO
Posts: 162
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by haccpguy
Using the dual plane manifold should give the needed clearance.
I was assured by Skip White Co exactly that.

Get notified of new replies

To C2 Motor Transplant

Old 03-29-2015, 10:18 AM
  #38  
tebok
Instructor
Thread Starter
 
tebok's Avatar
 
Member Since: Dec 2009
Location: Denver CO
Posts: 162
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by Crunch527
I disagree that he needs $20K...I didn't hear him say he was road racing or wanting to do 4000+RPM launches with slicks...if anything, put in a 11.5 inch clutch/flywheel and scatter shield, go to solid spicer u-joints and that is about it. The rear housing/carrier will be fine...the car won't hook up anyway...if the rear housing breaks, oh well...they are cheap...go get another one...bolt in and go...I have had 550+ hp small blocks and my car did fine.

He is already running a Dewitts rad w/ elec fan...same setup I have...it will cool that 406 no problem.

I do like the idea your idea of adding a TKO600. I run a TKO600...but the Muncie will live behind the 406 no problem.

If the brakes are in good working order, they are fine too. Discs would be better but not a requirement.

So with just the motor, maybe add another $1K for bigger clutch/flywheel/scatter shield/spicer ujoints. He can do this for $8K.

Worst case, assuming he buys 5speed/clutch/ujoints/scattershield, he's out approx $11,500 - $12,000. Assuming he does his own work (I do).

Whats the other $8K for?

Frank
Great reply Frank. I'm of the same mindset.

Old 03-29-2015, 10:18 AM
  #39  
lakebumm
Burning Brakes
 
lakebumm's Avatar
 
Member Since: Jan 2006
Location: NC
Posts: 1,072
Received 167 Likes on 63 Posts
2022 C2 of the Year Finalist - Modified

Default

It sounds like you may want to stay old school, but don't discount the LS engines. They're pretty amazing.


Bill
Old 03-29-2015, 10:33 AM
  #40  
chevahaulic
Pro
 
chevahaulic's Avatar
 
Member Since: Feb 2013
Posts: 729
Likes: 0
Received 0 Likes on 0 Posts
Default

Interesting read. Just bought a 64 300hp coupe that had overheating problems. This is the reason it has been stored since 1978. Owner was tired of paying shops to cure the problem . I haven't played with it yet. I have several options to check, thanks to this post , before replacing expensive parts.


Quick Reply: C2 Motor Transplant



All times are GMT -4. The time now is 02:27 PM.