to turbo or not to turbo

jasenklems · 10-11-2009, 11:07 PM

I just purchased a 1987 t-top that is in great shape want to know should I go turbo or not???? I know that I still have my 3.0l sho swap to finish but want to know what you all thought about a 20valve with a turbo....

traintech86 · 10-12-2009, 11:15 PM

never heard much about the 20v with a turbo. more comon would be a 4A-GZE with a turbo...

espguitarist33 · 10-12-2009, 11:20 PM

i plan for a really little turbo on my st at some point with a custom built intake design i've been drawing up. but it has to have some parts replaced to make more then a few psi boost

toyotaspeed90 · 10-13-2009, 03:27 PM

20V turbo is actually pretty common... you will need aftermarket pistons as the 20V's are not forged and are high compression. You will also need a custom plenum, as the stock plenum is good for about 5psi.

the block, crank, and rods are actually quite beefy in the 20V.... actually larger than in the same years of the gze... which makes no sense, but is true....

espguitarist33 · 10-13-2009, 03:57 PM

dont you mean are forged and arent high compression?

jasenklems · 10-13-2009, 09:56 PM

thanks for the info so far thanks

scottohno · 12-09-2009, 12:34 PM

Quote:

Originally Posted by espguitarist33

dont you mean are forged and arent high compression?

if they werent high compression he may be ok with stock, but they are high compression.

think of it like a baloon. you can squeeze a baloon all you want with no air in it. its fine. or even with some air in it. itll be ok.

but force more air into the baloon til its full of air (like a turbo fills the cylinder with air) thn squeeze it. itll pop.

high compression+boost=boom (a lot of the time)

jasenklems · 01-25-2010, 12:53 AM

thanks for all the help but I have decided to go with the mk1.5 3sgte swap instead of the sho swap and an update on my ttop it is gone moved into my new house and a tree fell on it and I went and sent it to the crushers no parts could be rescued from the car I am sad to say.....

toyotaspeed90 · 01-27-2010, 05:22 PM

Quote:

Originally Posted by espguitarist33

dont you mean are forged and arent high compression?

no... I said they will need new pistons as (aka because) the 20V pistons are not forged and are high compression....

10-11-2009, 11:07 PM	#1 (permalink)
jasenklems Cage Fighter Join Date: Jun 2009 Location: Mt. Healthy Ohio Posts: 139 Thanks: 7 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	to turbo or not to turbo I just purchased a 1987 t-top that is in great shape want to know should I go turbo or not???? I know that I still have my 3.0l sho swap to finish but want to know what you all thought about a 20valve with a turbo....

10-13-2009, 03:57 PM	#5 (permalink)
espguitarist33 Cage Fighter Join Date: Nov 2008 Location: west chester PA Posts: 528 Thanks: 4 Thanked 7 Times in 7 Posts iTrader Rating: (2/100% )	dont you mean are forged and arent high compression? Last edited by espguitarist33; 10-14-2009 at 02:10 AM..

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10-12-2009, 11:15 PM	#2 (permalink)
traintech86 Cage Fighter Join Date: May 2009 Location: Yokosuka, Kanagawa Japan Posts: 1,799 Thanks: 27 Thanked 47 Times in 43 Posts My Google Map iTrader Rating: (3/100% )	never heard much about the 20v with a turbo. more comon would be a 4A-GZE with a turbo...

10-12-2009, 11:20 PM	#3 (permalink)
espguitarist33 Cage Fighter Join Date: Nov 2008 Location: west chester PA Posts: 528 Thanks: 4 Thanked 7 Times in 7 Posts iTrader Rating: (2/100% )	i plan for a really little turbo on my st at some point with a custom built intake design i've been drawing up. but it has to have some parts replaced to make more then a few psi boost

10-13-2009, 03:27 PM	#4 (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% )	20V turbo is actually pretty common... you will need aftermarket pistons as the 20V's are not forged and are high compression. You will also need a custom plenum, as the stock plenum is good for about 5psi. the block, crank, and rods are actually quite beefy in the 20V.... actually larger than in the same years of the gze... which makes no sense, but is true....

10-13-2009, 09:56 PM	#6 (permalink)
jasenklems Cage Fighter Join Date: Jun 2009 Location: Mt. Healthy Ohio Posts: 139 Thanks: 7 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	thanks for the info so far thanks

01-25-2010, 12:53 AM	#8 (permalink)
jasenklems Cage Fighter Join Date: Jun 2009 Location: Mt. Healthy Ohio Posts: 139 Thanks: 7 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	thanks for all the help but I have decided to go with the mk1.5 3sgte swap instead of the sho swap and an update on my ttop it is gone moved into my new house and a tree fell on it and I went and sent it to the crushers no parts could be rescued from the car I am sad to say.....