Toyota MR2 Message Board - View Single Post - 3S-GTE USDM Turbo Engine eBay IC cores: for low power only

RickyB · 12-18-2007, 07:30 PM

I finally had someone come in with a reasonably built MR2 for me to tune with one of the popular eBay IC cores. Average manifold temperatures rose 25C (45F) during a single 4th gear Dynojet pull. This was with the shop temperatures ranging in the low 60's. I hate to think what I would have seen on a hot day. The car made 342rwhp on short 3rd gear pulls, but it showed a peak power drop of over 20rwhp between 3rd gear and 4th gear pulls because of heatsoak. By comparison, a Turbohoses Stage 9 IC core only showed a 5C (9F) temperature rise during a 4th gear pull at similar power levels on a warmer day. These eBay cores might make fine replacements for the stock IC on low power 170-250rwhp MR2s, but the datalogs show that they don't belong on 300rwhp cars.

12-18-2007, 07:30 PM	#1 (permalink)
RickyB Automotive Cartographer Join Date: Dec 2005 Location: California Posts: 221 Thanks: 0 Thanked 122 Times in 33 Posts iTrader Rating: (0/0% )	eBay IC cores: for low power only I finally had someone come in with a reasonably built MR2 for me to tune with one of the popular eBay IC cores. Average manifold temperatures rose 25C (45F) during a single 4th gear Dynojet pull. This was with the shop temperatures ranging in the low 60's. I hate to think what I would have seen on a hot day. The car made 342rwhp on short 3rd gear pulls, but it showed a peak power drop of over 20rwhp between 3rd gear and 4th gear pulls because of heatsoak. By comparison, a Turbohoses Stage 9 IC core only showed a 5C (9F) temperature rise during a 4th gear pull at similar power levels on a warmer day. These eBay cores might make fine replacements for the stock IC on low power 170-250rwhp MR2s, but the datalogs show that they don't belong on 300rwhp cars.