Options. 350 or 400 with lt1 intake
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Junior Member
Joined: Jul 2012
Posts: 64
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From: Oklahoma
Car: 64'olds 442, 87 Formula 350
Engine: 350 tpi
Transmission: Auto
Axle/Gears: 3.27 borg warner 9 bolt
Options. 350 or 400 with lt1 intake
I have a few options open to me and I'm lookin for some others imput.
I have a 96 vortec with lt1 rods and pistons
Also have a fresh 400sbc.
The heads on both will be 67cc dart S/R fully ported and polished with a vj.
The cam will be small( 21x,22x and around 450 lift)
Lt1 intake or tricked out tpi setup?
Car is a auto with bw 9 bolt 3:27 gears.
Which combo seems to be the best with the given parts? I know the 400 with the tpi is a torque beast not sure about it with the lt1 intake.
I have a 96 vortec with lt1 rods and pistons
Also have a fresh 400sbc.
The heads on both will be 67cc dart S/R fully ported and polished with a vj.
The cam will be small( 21x,22x and around 450 lift)
Lt1 intake or tricked out tpi setup?
Car is a auto with bw 9 bolt 3:27 gears.
Which combo seems to be the best with the given parts? I know the 400 with the tpi is a torque beast not sure about it with the lt1 intake.
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Can we assume either option would run a TPI ECM? If so, what year/type?
The Vortec engine probably has the superior block casting. However, it's hard to leave displacement on the table.
Also, it would be nice to know the intended use of the finished product. Daily driver? Weekend cruiser? I assume not a weekend drag racer, but don't want to be presumptuous.
Sounds like you're going more for low-RPM operation. The 350 with TPI should be a good driver combo. If you're thinking drag strip, then the 400 with Stealth Ram (and maybe more cam) would be the ticket.
The Vortec engine probably has the superior block casting. However, it's hard to leave displacement on the table.
Also, it would be nice to know the intended use of the finished product. Daily driver? Weekend cruiser? I assume not a weekend drag racer, but don't want to be presumptuous.
Sounds like you're going more for low-RPM operation. The 350 with TPI should be a good driver combo. If you're thinking drag strip, then the 400 with Stealth Ram (and maybe more cam) would be the ticket.
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 64
Likes: 0
From: Oklahoma
Car: 64'olds 442, 87 Formula 350
Engine: 350 tpi
Transmission: Auto
Axle/Gears: 3.27 borg warner 9 bolt
Re: Options. 350 or 400 with lt1 intake
Can we assume either option would run a TPI ECM? If so, what year/type?
The Vortec engine probably has the superior block casting. However, it's hard to leave displacement on the table.
Also, it would be nice to know the intended use of the finished product. Daily driver? Weekend cruiser? I assume not a weekend drag racer, but don't want to be presumptuous.
Sounds like you're going more for low-RPM operation. The 350 with TPI should be a good driver combo. If you're thinking drag strip, then the 400 with Stealth Ram (and maybe more cam) would be the ticket.
The Vortec engine probably has the superior block casting. However, it's hard to leave displacement on the table.
Also, it would be nice to know the intended use of the finished product. Daily driver? Weekend cruiser? I assume not a weekend drag racer, but don't want to be presumptuous.
Sounds like you're going more for low-RPM operation. The 350 with TPI should be a good driver combo. If you're thinking drag strip, then the 400 with Stealth Ram (and maybe more cam) would be the ticket.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Options. 350 or 400 with lt1 intake
Both require work and / or $$$
The HSR as previously mentioned gives the best of both worlds at a cheaper price and is available in a Vortec
version that is a bolt swap.
The Vortec TPI base you require is nearly $500 on it's own
http://www.summitracing.com/parts/edl-3817/overview/
before buying the big tube runners , etc
http://www.summitracing.com/parts/edl-3870
LT1 is dirt cheap if you can do the mods (welding ) yourself but requires a remote thermo housing
and rework of the radiator hoses that the other two intakes don't
Vortec HSR is $540 for complete intake
http://www.summitracing.com/parts/WND-7542/
http://www.summitracing.com/parts/HLY-534-186/
There are extra costs in plumbing the fuel lines up to a HSR but you will incur them with a LT1 intake swap anyway
Read this to see the differences in intake styles
http://xtremecarzone.com.au/index.php?showtopic=386
Don't look at the Hp numbers , look at the graphs to see were each intake works and where it runs out of puff.
LT1 is similar to the Miniram in the comparison
The HSR as previously mentioned gives the best of both worlds at a cheaper price and is available in a Vortec
version that is a bolt swap.
The Vortec TPI base you require is nearly $500 on it's own
http://www.summitracing.com/parts/edl-3817/overview/
before buying the big tube runners , etc
http://www.summitracing.com/parts/edl-3870
LT1 is dirt cheap if you can do the mods (welding ) yourself but requires a remote thermo housing
and rework of the radiator hoses that the other two intakes don't
Vortec HSR is $540 for complete intake
http://www.summitracing.com/parts/WND-7542/
http://www.summitracing.com/parts/HLY-534-186/
There are extra costs in plumbing the fuel lines up to a HSR but you will incur them with a LT1 intake swap anyway
Read this to see the differences in intake styles
http://xtremecarzone.com.au/index.php?showtopic=386
Don't look at the Hp numbers , look at the graphs to see were each intake works and where it runs out of puff.
LT1 is similar to the Miniram in the comparison
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