1.6 to 20v top - Page 2

chrisclose · 05-11-2009, 02:54 AM

ill sell you a ST head if you want to give it a go.......be sure to post the results!

ebouwman · 05-14-2009, 12:24 PM

actually, you know what would be better? Doing the 7age build with a st or bt head!

Imagine that, itb's, vvt, high revving, and a 1.8 L

Jackstand Queen · 05-15-2009, 03:10 AM

Thanks Toyotaspeed 90 for providing your informed opinion. It was refreshing to read something that made sense.

What no one has mentioned is the VVT variable valve timing mechanism would need to be operated by the ECU. That same ECU would have to be fuel mapped, for forced induction.

The only answer I could see is a uniquely modified, and programed DYI EMS. A supercharged 20v is a good idea conceptually, but there'd be a ton of problems and issues to iron out.

328FTW · 05-15-2009, 03:53 AM

Shooting for 200hp with a silvertop should be easily possible with stand alone plus moving over to map and running low boost. I have seen some epic silvertop projects, usually it is putting 4agze internals in it and putting on a turbo or a 7afe shortblock with the silvertop head and a set of H beam rods + big turbo

. The head flows very well and responds well to most modifications especially intake/exhaust mods. I want to get my silvertop swap underway but I need an ecu first.

ebouwman · 05-15-2009, 03:58 AM

Only if you wanted to run vvt, but i guess thats part of the point of getting a 20v right.

But you could either run the gze ecu and ditch vvt, or go aftermarket ems and program it in.

328FTW · 05-15-2009, 04:10 AM

I would ditch the stock ecu, there are large gains to be had tuning your engine with supporting mods, stock the engines overfuel to give a margin of safety. A good tuner can lean the cars fuel out for horsepower without damaging the engine. Plus there is a point where the stock ecu is just like "WTF DID YOU DO!!! cannot compute kthxbye"

toyotaspeed90 · 05-15-2009, 09:05 PM

vvt is a less smart system -- it just requires to be on or off..... in a boosted setup you could just use a hobbs pressure switch to have it activate at a specific pressure

05-15-2009, 03:53 AM	#24 (permalink)
328FTW Crazy Nasty Honey Badger Join Date: Aug 2008 Location: New Zealand Posts: 5,222 Thanks: 24 Thanked 266 Times in 239 Posts My Google Map iTrader Rating: (1/100% )	Shooting for 200hp with a silvertop should be easily possible with stand alone plus moving over to map and running low boost. I have seen some epic silvertop projects, usually it is putting 4agze internals in it and putting on a turbo or a 7afe shortblock with the silvertop head and a set of H beam rods + big turbo. The head flows very well and responds well to most modifications especially intake/exhaust mods. I want to get my silvertop swap underway but I need an ecu first.

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05-11-2009, 02:54 AM	#21 (permalink)
chrisclose Cage Fighter Join Date: Dec 2006 Location: tulsa OK Posts: 133 Thanks: 3 Thanked 2 Times in 2 Posts iTrader Rating: (2/100% )	ill sell you a ST head if you want to give it a go.......be sure to post the results!

05-14-2009, 12:24 PM	#22 (permalink)
ebouwman Curve Hugger Join Date: Jan 2009 Location: BC Posts: 1,600 Thanks: 19 Thanked 51 Times in 51 Posts My Google Map iTrader Rating: (0/0% )	actually, you know what would be better? Doing the 7age build with a st or bt head! Imagine that, itb's, vvt, high revving, and a 1.8 L

05-15-2009, 03:10 AM	#23 (permalink)
Jackstand Queen Cage Fighter Join Date: May 2008 Posts: 840 Thanks: 75 Thanked 64 Times in 60 Posts iTrader Rating: (1/100% )	Thanks Toyotaspeed 90 for providing your informed opinion. It was refreshing to read something that made sense. What no one has mentioned is the VVT variable valve timing mechanism would need to be operated by the ECU. That same ECU would have to be fuel mapped, for forced induction. The only answer I could see is a uniquely modified, and programed DYI EMS. A supercharged 20v is a good idea conceptually, but there'd be a ton of problems and issues to iron out.

05-15-2009, 03:58 AM	#25 (permalink)
ebouwman Curve Hugger Join Date: Jan 2009 Location: BC Posts: 1,600 Thanks: 19 Thanked 51 Times in 51 Posts My Google Map iTrader Rating: (0/0% )	Only if you wanted to run vvt, but i guess thats part of the point of getting a 20v right. But you could either run the gze ecu and ditch vvt, or go aftermarket ems and program it in.

05-15-2009, 04:10 AM	#26 (permalink)
328FTW Crazy Nasty Honey Badger Join Date: Aug 2008 Location: New Zealand Posts: 5,222 Thanks: 24 Thanked 266 Times in 239 Posts My Google Map iTrader Rating: (1/100% )	I would ditch the stock ecu, there are large gains to be had tuning your engine with supporting mods, stock the engines overfuel to give a margin of safety. A good tuner can lean the cars fuel out for horsepower without damaging the engine. Plus there is a point where the stock ecu is just like "WTF DID YOU DO!!! cannot compute kthxbye"

05-15-2009, 09:05 PM	#27 (permalink)
toyotaspeed90 No Skills Join Date: Jun 2006 Location: Bellingham, WA Posts: 2,401 Thanks: 0 Thanked 148 Times in 143 Posts My Google Map iTrader Rating: (0/0% )	vvt is a less smart system -- it just requires to be on or off..... in a boosted setup you could just use a hobbs pressure switch to have it activate at a specific pressure