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MOst affordable 1500 forged pistons?

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GeorgeOhr Nonya Business
Yes, confused, USA   USA
I need to rebuild my 1500 and would like forged pistons but really don;t want to pay $800. What other pistons from different engines could be made to work? I don't mind a rod swap, block decking or a new crank journalsize as those were things I had in mind anyway. Is there anything else besides TR6 pistons that can be used? Thanks

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clshore Carter Shore
Beverly Hills, FL, USA   USA
Is there a reason you need forged pistons?
The real weak spot is those 720g connecting rods (must be made of depleted uranium).
Get a set of forged rods instead.

quikrx Ralph Hansen
Antioch, IL, USA   USA
1962 Triumph Herald 1200
1969 Triumph Spitfire MkIII "Gloria"
1987 Mazda RX-7 "Mistress"
2003 Toyota Celica GT-S "Natasha"    & more
forged pistons will run around 200.00 ea no matter what they fit - have contacts here for some diff manuf and all about the same - I agree with Carter on the rods, but again a bit pricey for the street but will be better than oe rods

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wbclassics Kai Radicke
Syracuse, NY, USA   USA
The biggest advantage of forged pistons, if they're spec'd right, is that you get a set of modern piston rings on them. A modern piston ring set will not only operate with less friction, but will seal better under load, and the materials used are more durable so the rings will last longer even with harsher use. There are a few places that sell forged pistons that still use original style piston rings, which is a bit pointless if you're building any sort of high end performance motor.

We do our Spit 1500 forged pistons at $735/set (pistons, ring packs, wrist pins, locks). And $150 of that price can be attributed just to the piston ring package we use from Nippon Piston Ring in Japan.

But if you are just looking to lose weight, then Carter is correct, get some lighter rods. Carrillos will be 460g/rod and cost you $1260... or if you're looking for every little bit, we have rods that are at 420g/rod and with a better bolt than even what the Carrillo rod comes with for about the same price as a Carrillo. In a future design revision, we might even be able to tweak the rod a tad more to get under 400g... but for now, current production design is spec'd at 420g/rod.

You can pull off about 2.5lbs from the original 1500 crankshaft as well, but it is a pretty specialist task.

None of this stuff is cheap (when done properly).



Edited 1 time(s). Last edit at 2018-01-03 05:21 PM by wbclassics.

Tonyfixit Avatar
Tonyfixit Tony M
Duncan, BC, Canada   CAN
Beware of cheap forged pistons if you find them!

Doug in Vegas Avatar
Doug in Vegas Douglas D
Las Vegas, NV, USA   USA
In reply to # 1505752 by wbclassics The biggest advantage of forged pistons, if they're spec'd right, is that you get a set of modern piston rings on them. A modern piston ring set will not only operate with less friction, but will seal better under load, and the materials used are more durable so the rings will last longer even with harsher use. There are a few places that sell forged pistons that still use original style piston rings, which is a bit pointless if you're building any sort of high end performance motor.

We do our Spit 1500 forged pistons at $735/set (pistons, ring packs, wrist pins, locks). And $150 of that price can be attributed just to the piston ring package we use from Nippon Piston Ring in Japan.

But if you are just looking to lose weight, then Carter is correct, get some lighter rods. Carrillos will be 460g/rod and cost you $1260... or if you're looking for every little bit, we have rods that are at 420g/rod and with a better bolt than even what the Carrillo rod comes with for about the same price as a Carrillo. In a future design revision, we might even be able to tweak the rod a tad more to get under 400g... but for now, current production design is spec'd at 420g/rod.

You can pull off about 2.5lbs from the original 1500 crankshaft as well, but it is a pretty specialist task.

None of this stuff is cheap (when done properly).

I suppose it could be considered part of an overall transformation to modernize the engine. Megajolt and megasquirt for example.

14GPDJENGINEERING Avatar
Silver Spring, MD, USA   USA
I have a set of 3 new TR6 forged pistons with pins 2.940" bore, weight -- 242 grams (without rings or pins)

The pistons are actually spares I got from Group 44. They are TR6 std. which is 0.040 for the Spitfire 1300 or 1500 (2.940" bore, compression height 1.160"winking smiley,
they were produced for AAR Eagle (Dan Gurney Racing).
They do require a significant cut off the top of the block to get zero deck clearance. This is referenced in the Competition Preparation Manual.

You would only have to order one new custom piston to make a full set of four. PM me if interested.



Dennis smiling smiley

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Lizzard d id
san jose, CA, USA   USA
"Total Seal’s Spacers Bring Thin-ring Technology to Wide Grooves"
http://www.enginelabs.com/news/total-seals-spacers-bring-thin-ring-technology-to-wide-grooves/

Brad.Cogan Avatar
Brad.Cogan Bradley Cogan
RAF Cosford, Shropshire, UK   GBR
1977 Triumph Spitfire 1500 "Wray"
1989 Toyota MR2 "Red Mister Two"
2007 Fiat Grande Punto "Pepper"
You might be better off spending your money on a set of light forged rods and a quality set of rings rather than the pistons. If you don't already just get the euro spec flat top pistons.



Brad Cogan

1977 Triumph Spitfire 1500 'Wray'
1989 Toyota MR2 Mk1b AW11 1600 twin cam
2007 Fiat Grande Punto Active 1.2 'Pepper'

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Lizzard d id
san jose, CA, USA   USA
Are you suffering failures with your cast pistons ? If so how so ?

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