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lonewanderer · 12-11-2018, 07:31 PM

Hey guys, searched for a thread on this and couldnt find anything. Maybe I am wording the search weird, but I felt it may be easier to post a thread with my question. So. I eventually want to build a motor on the side of my current SR. I like the idea of a built motor, but not very fond of the maintenance in which comes with it. That being the case, I am looking to do a complete OEM upgrade to the engine. Keep it simple, reliable and still increase the HP. Obvious oil upgrades would be included, with s15 SR Parts (this is an s13 blacktop) as well as fuel like the simple z32 TT fuel filter upgrade.

I was looking to upgrade to VG30DETT pistons that are 87mm in diameter compared to that of the OEM SR at 86mm. I was also considering using KA24DE pistons, however, at 89mm I may have to resleeve the block which is expensive as you all know. My question is that due to the upgrade in piston size, does the stroke of the rod change? Would it be possible to use the SR rods, or would it be wise to use the rods from the engine I choose to take pistons from? Would also consider utilizing aftermarket rods with the pistons but would like to overall keep an OEM build upgrade due to the availability in parts still available for both engines and that it is significantly cheaper than aftermarket items.

This engine is for street and minor track purposes. The goal is to have an easy maintenance engine that is easy to rebuild in worst case scenarios where engine failure can occur. So if after a track day, I develop a rod knock or something, I am not x amount of dollars in the hole because of aftermarket parts. Pistons and Rods from any of these engines is far easier to stock pile in case of emergencies.

Thanks for looking guys

12-11-2018, 07:31 PM	#1
lonewanderer Zilvia Member Join Date: Oct 2015 Location: Dartmouth, MA Age: 31 Posts: 276 Trader Rating: (0)	Engine internal upgrade question. Hey guys, searched for a thread on this and couldnt find anything. Maybe I am wording the search weird, but I felt it may be easier to post a thread with my question. So. I eventually want to build a motor on the side of my current SR. I like the idea of a built motor, but not very fond of the maintenance in which comes with it. That being the case, I am looking to do a complete OEM upgrade to the engine. Keep it simple, reliable and still increase the HP. Obvious oil upgrades would be included, with s15 SR Parts (this is an s13 blacktop) as well as fuel like the simple z32 TT fuel filter upgrade. I was looking to upgrade to VG30DETT pistons that are 87mm in diameter compared to that of the OEM SR at 86mm. I was also considering using KA24DE pistons, however, at 89mm I may have to resleeve the block which is expensive as you all know. My question is that due to the upgrade in piston size, does the stroke of the rod change? Would it be possible to use the SR rods, or would it be wise to use the rods from the engine I choose to take pistons from? Would also consider utilizing aftermarket rods with the pistons but would like to overall keep an OEM build upgrade due to the availability in parts still available for both engines and that it is significantly cheaper than aftermarket items. This engine is for street and minor track purposes. The goal is to have an easy maintenance engine that is easy to rebuild in worst case scenarios where engine failure can occur. So if after a track day, I develop a rod knock or something, I am not x amount of dollars in the hole because of aftermarket parts. Pistons and Rods from any of these engines is far easier to stock pile in case of emergencies. Thanks for looking guys