| Author |  Topic  | |
RhysN
V4 Fanatic
United Kingdom
411 Posts |  Posted - 20 Apr 2017 : 20:26:19  
| As it was suggested I use the search function to find what I wanted to know, and it was a fairly inconclusive result, I am seeking thoughts.
Rather than just asking what is good, I seek comments on this list. It will be a spare to build up until it's complete. This is what I gleaned from the 90 minutes, but as per paragraph 1...
1700 closed block
Standard valves but ported somewhat (do I need hardened seats?)
Pinto pistons (what rods?)
Cam grind with current availability? 90% road use.
Steel balance shaft gears with 1.5 shaft
Twin choke 28/36 DCD
Exhaust similar to Saab Sport.
Balancing? (Who to use?)
Any other thoughts welcomed. |
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melle
V4 Guru
United Kingdom
3833 Posts | Posted - 20 Apr 2017 : 21:03:13
| quote:
Originally posted by RhysN
1700 closed block
You want a closed deck block with matching heads (you'll have a hard time finding an open deck block and heads anyway). 1.5 and 1.7 blocks and heads are identical.
quote:
Originally posted by RhysN
Standard valves but ported somewhat (do I need hardened seats?)
If the valves and seats are good I wouldn't spend money on hardened seats. If you do, you might want new valves and guides as well... Re porting: I would focus on enlarging the exhaust manifolds and matching the inlets on the intake manifold and heads. See the S&R manual and relevant forum threads.
quote:
Originally posted by RhysN
Pinto pistons (what rods?)
Pinto pistons for >1.7 engines, JP for 1.5s. 1.5 and 1.7 con rods are identical.
quote:
Originally posted by RhysN
Cam grind with current availability? 90% road use.
I would use a standard cam.
quote:
Originally posted by RhysN
Steel balance shaft gears with 1.5 shaft
I don't see the need for steel timing gears for a road engine.
quote:
Originally posted by RhysN
Twin choke 28/36 DCD
Or 32/36 DG(A/E)V, more modern and better parts availability.
quote:
Originally posted by RhysN
Exhaust similar to Saab Sport.
Jetex is OK bar the front section (can be modified though) and readily available.
quote:
Originally posted by RhysN
Balancing? (Who to use?)
You can balance pistons and rods yourself, as well as the flywheel/ clutch assembly. I've never bothered with balancing, so can't advice from experience.
I would first buy a car and drive it a bit to establish what you want before starting an engine build. I'm sure a good condition 1.5 engine with a Jetex exhaust, some porting and a proper carb on the 2bbl manifold you already have won't disappoint you for road use.
www.saabv4.com |
Edited by - melle on 20 Apr 2017 22:43:05 |  |
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RhysN
V4 Fanatic
United Kingdom
411 Posts | Posted - 20 Apr 2017 : 21:13:33
| Thanks, appreciate the thoughts. My thought was to build another engine, just because I can, and right now, having sold all the toys in NZ the "toy fund" is looking OK which it might not in the future :)
When it went into a car, well that might be.....
I WILL be looking for alternate to steel wheels. | |
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beta
V4 Fanatic
Ireland
278 Posts | Posted - 21 Apr 2017 : 14:21:02
| | If you use the 1.7 crank and standard Pinto pistons from say a Granada you will need to remove a good bit of material from the head combustion chambers or else the CR will be through the roof - ask me how I know. Back in the day Rich Simpson came to my aid by cc'ing a set of heads for me that would suit standard Pinto Pistons.Taking a bit of material off the top of the pistons would have been a lot easier in hindsight. | |
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Nice engine
