Emulating a Callaway TT Engine, sorta....

Discussion of Corvette based Callaway Cars including: 1987-1991 RPO B2K Callaway Twin Turbo Corvettes (C4); Callaway SuperNatural Corvettes (CL-1/CR-1); Callaway C12; Supercharged Corvettes; Callaway C16; 6th Generation Callaway Corvettes (SC560, SC580, SC606, SC616, SC620, SC652); 7th Generation Callaway Corvettes (SC627/SC757); NEW Callaway C8 Corvettes - and more!
Post Reply
User avatar
undercover
7-PSI
7-PSI
Posts: 237
Joined: Mon Oct 27, 2008 2:31 pm
Location: Seattle, WA
Contact:

Re: Emulating a Callaway TT Engine, sorta....

Post by undercover »

*89x2* wrote: Mon Nov 22, 2021 5:42 pm Where did that intake setup come from. Or more importantly, where is it going?
I bought it on eBay years ago - not entirely sure of its origin. I was told the TPI intake we all know and love was designed for 305 cid, and that this is a prototype made in 1986 (winters casting with 1986 date codes) designed specifically for the increased displacement of the 350.

It's now in my parts hoard destined to sit atop 1987 #147's motor someday
1987 CTTC conv #147
1987 Guldstrand/Traco Grand Sport 80 #18
Block Tester
*89x2*
VIP COG Brother
VIP COG Brother
Posts: 672
Joined: Tue Oct 21, 2008 9:58 pm

Re: Emulating a Callaway TT Engine, sorta....

Post by *89x2* »

Undercover, you are correct, the TPI engine in its earliest years was for the 215 horsepower 305 in the Camaro and 230 horsepower 1985 Corvette. With improvements in air induction and cylinder heads over the years, plus better camshaft profiles and roller valve train came more power, but 250 hp was it.

Now, in 1992, evolution continued with the L98 and this was the 270 hp result which never made production...
Attachments
92runners4.jpg
92runners3.jpg
92runners2.jpg
92runners1.jpg
User avatar
undercover
7-PSI
7-PSI
Posts: 237
Joined: Mon Oct 27, 2008 2:31 pm
Location: Seattle, WA
Contact:

Re: Emulating a Callaway TT Engine, sorta....

Post by undercover »

I think what you show came later - that's an F-body ('92 Heritage edition - was in the magazines but never sold). You can tell it's later because it's speed density. I love prototype intakes! Always a cool backstory to them.
1987 CTTC conv #147
1987 Guldstrand/Traco Grand Sport 80 #18
Block Tester
User avatar
SurfnSun
Site Admin
Site Admin
Posts: 2331
Joined: Wed Aug 27, 2008 9:44 pm
Location: Central FL
Contact:

Re: Emulating a Callaway TT Engine, sorta....

Post by SurfnSun »

Found a pic of SLP runners on a B2k
Attachments
10C76A75-9AC5-4F5A-987C-0B890FF7DB49.png
Never_Lift
7-PSI
7-PSI
Posts: 175
Joined: Mon Feb 07, 2011 7:28 pm

Re: Emulating a Callaway TT Engine, sorta....

Post by Never_Lift »

SurfnSun wrote: Thu Nov 25, 2021 10:59 am Found a pic of SLP runners on a B2k
That actually looks pretty good. I found several more pictures of different manifolds on sites and they all seem to fit rather nicely. Would be interesting to see gains for each over factory TPI. Wonder if Holdener can find the cars and test each of them for us?
Attachments
ProtoManifold5.jpg
protoManifold3.jpg
protoManifold2.jpg
protoTPIManifold1.jpg
Manifold TPIS MiniRam.jpg
manifold 100 plus.jpg
manifold 100 plus.jpg (172.66 KiB) Viewed 3439 times
Never_Lift
7-PSI
7-PSI
Posts: 175
Joined: Mon Feb 07, 2011 7:28 pm

Re: Emulating a Callaway TT Engine, sorta....

Post by Never_Lift »

Upload failed, but here's another attempt, comparing against the Holley Stealth Ram
Attachments
ProtoManifold10.png
protoManifold9.png
protoManifold8.png
ProtoManifold7.jpg
ProtoManifold6.jpg
User avatar
SurfnSun
Site Admin
Site Admin
Posts: 2331
Joined: Wed Aug 27, 2008 9:44 pm
Location: Central FL
Contact:

Re: Emulating a Callaway TT Engine, sorta....

Post by SurfnSun »

Miniram
Attachments
0798CD68-88CE-4E07-B828-A8765EBEBAA8.jpeg
0798CD68-88CE-4E07-B828-A8765EBEBAA8.jpeg (62.58 KiB) Viewed 3433 times
User avatar
1988Callaway#16
5-PSI
5-PSI
Posts: 80
Joined: Mon Jan 01, 2018 10:50 pm
Location: Bellevue NE

Re: Emulating a Callaway TT Engine, sorta....

Post by 1988Callaway#16 »

Do you have any hp/tq numbers for adding the miniram to stock B2K? Thanks! Kevin
User avatar
SurfnSun
Site Admin
Site Admin
Posts: 2331
Joined: Wed Aug 27, 2008 9:44 pm
Location: Central FL
Contact:

Re: Emulating a Callaway TT Engine, sorta....

Post by SurfnSun »

Miniram is probably the worst option…look at the top pic of the red miniram. It needed a full rebuild to get the inlet angle right. They also eliminated the supplemental injectors and went with 16 injectors like the zr1.
Post Reply