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T O P I C R E V I E W | RhysN | 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. | 3 L A T E S T R E P L I E S (Newest First) | beta | 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. | RhysN | 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. | melle | 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.
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