MK-I MK-II MK-III MK-IV GULF MIRAGE J-CAR LOLA
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Why not start with your first post today and become an active part of GT40s.com now! And, if you find you enjoy GT40s.com think about becoming a Forum Supporter. | | GT40 Tech - Engines/Induction/Exhaust Motors and engine related - right here! | 
05-25-06, 02:42 PM
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#1 (permalink)
| | Rookie 
Join Date: Jan 2004
Posts: 57
Rep Power: 5  |  306 dyno results!!
2.87X4.125 dart aluminium block
pro top line iron head 2.02X1.60 flow:311@ .600 213@.600
51 IDA's Weber
5.400 rod, 11.0 CR
TQ HP
4000 373 284
4200 357 286
4400 377 316
4600 404 354
4800 410 375
5000 404 385
5200 403 399
5400 405 416
5600 405 431
5800 401 443
6000 397 453
6200 391 462
6400 386 471
6500 382 473
6600 367 461 | 
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05-25-06, 09:21 PM
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#2 (permalink)
| | delaneyp Peter D 
Join Date: Sep 2001 Location: Sydney, Australia GT40: DRB #27
Posts: 1,245
Rep Power: 21 | Nice numbers !
I am shooting for something like this with the rebuild of my old engine as a 331, AFR 165's, 10.5:1, etc. I hope it turns out as well as yours did.
Kind Regards,
Peter D.
__________________
DRB (GT40 Australia) #27
331 Windsor / GD-50
8-Stack EFI / Autronic
Dark Metallic Blue Pearl | |
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05-25-06, 10:25 PM
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#3 (permalink)
| | salmjo1 3 Tenths 
Join Date: Aug 2005 Location: Lynchburg, VA
Posts: 336
Rep Power: 7 |
Can I ask a novice question (Ok, several)? I want to see if I understand - the block is a little over bore (4.125 vs 4.00) with a shorter stroke (2.87 vs 3.00). So I am assuming: similar displacement, but the shorter stroke helps with reciprocating forces and rod angle..? What are the real world benefits? Will it inherently rev faster; will it be easier to handle higher revs? In other words, what are the benefits over a 302?
Also, why the aluminum block but iron heads? Stronger?
Obviously this works - that is impressive output for displacement.
Thanks for the help.
-J.
Last edited by salmjo1; 05-25-06 at 10:31 PM.
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05-26-06, 03:45 AM
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#4 (permalink)
| | Rookie
Join Date: Jan 2004
Posts: 57
Rep Power: 5 | Quote: |
Originally Posted by salmjo1 Can I ask a novice question (Ok, several)? I want to see if I understand - the block is a little over bore (4.125 vs 4.00) with a shorter stroke (2.87 vs 3.00). So I am assuming: similar displacement, but the shorter stroke helps with reciprocating forces and rod angle..? What are the real world benefits? Will it inherently rev faster; will it be easier to handle higher revs? In other words, what are the benefits over a 302?
Also, why the aluminum block but iron heads? Stronger?
Obviously this works - that is impressive output for displacement.
Thanks for the help.
-J. | Restricted rules, must have original stroke and iron heads with stock iron rockers!!! | |
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05-26-06, 09:31 AM
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#5 (permalink)
| | Mark Worthington 10 tenths
Join Date: Dec 2001 GT40: Massachusetts
Posts: 1,790
Rep Power: 24 | Awesome! I was thinking you used iron heads to allow higher compression...
__________________
Regards,
Mark
RF Chassis No. 36 still under construction
347, MoTeC EFI, pin drives, leather, etc. | |
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05-26-06, 11:25 AM
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#6 (permalink)
| | Rookie
Join Date: Jan 2004
Posts: 57
Rep Power: 5 | Quote: |
Originally Posted by Mark Worthington Awesome! I was thinking you used iron heads to allow higher compression... | exactly!!! | |
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05-27-06, 05:42 PM
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#7 (permalink)
| | salmjo1 3 Tenths
Join Date: Aug 2005 Location: Lynchburg, VA
Posts: 336
Rep Power: 7 | Ah... Thanks. | |
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