Lunati EFI Flat Tappet Cams (SBC) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SCOTI · 11-16-2019, 11:16 PM

Has anyone used one of these cams & care to offer your experience?

I was gifted a used 400 from a buddy that passed away last year (817 2-bolt block, dished cast pistons, Dart Iron Eagle 200/64cc, Eddy Perf RPM, 1 5/8 headers, 2.5 dual h-pipe exhaust out of a 71 El Camino). A buddy & I recently tore into the motor & found it's in need of some love. Seems it saw some excessive spray more than once & was missing 1/4 of the crown on one piston (yet still had cylinder pressure when we tested LoL).

Since the OE 305/2bbl/th350 in the Bu isn't exactly a threat & gets about 10mpg w/city driving, I'm toying w/the idea of going to a local rebuilders I've used before & get a fresh short block w/flat tops vs. the dished pistons @ no difference in the cost. This is a very budget deal w/parts already on hand & I'll use some new/old AFR 190 Street heads w/74cc combustion chambers. I've been researching cams & when doing the engine calcs, I get within 10hp using one of these Lunati EFI flat tappets vs budget (Howards) Hyd Roller spec cams. The flat tappet approach is <$250; the HYD Roller ~ $725. The one that seems to be the right fit: 280/290 ADV; 230/240 @.050; .489/.520 w/1.5's; 112LSA/108ICL.

This would be a 100% 'street/torque' build. No racing intended/expected.

GASoline71 · 11-18-2019, 08:56 PM

That's a pretty rowdy cam. In my 355 I have a Lunati Bracket Master II (flat tappet) 292 and it is a 230 @ .050 and .480 lift, with a 108 Lobe Center. It lopes like hell and has great top end pull. have a 3,000 RPM stall with headers and an Edelbrock Performer RPM Airgap manifold with a Holley carb. I love the cam, but I'm used to driving rigs with big cams and loose converters.

What is your transmission?

Gary

SCOTI · 11-18-2019, 11:01 PM

Quote:

Originally Posted by GASoline71

That's a pretty rowdy cam. In my 355 I have a Lunati Bracket Master II (flat tappet) 292 and it is a 230 @ .050 and .480 lift, with a 108 Lobe Center. It lopes like hell and has great top end pull. have a 3,000 RPM stall with headers and an Edelbrock Performer RPM Airgap manifold with a Holley carb. I love the cam, but I'm used to driving rigs with big cams and loose converters.

What is your transmission?

Gary

TH350 is the current trans. Looking for a 200-4r or a 4l80e to have built... or .... depending on that cost, it's not out of the realm to receive a 3rd pedal.

Seems the additional cubes tame the characteristics listed on sbc cams according to research. I've been looking up info & 230-235 intake duration is a good call for 400's w/decent flowing heads from stuff/articles I've read .

Tom · 11-19-2019, 08:37 PM

Sounds like a nice mid range combo honestly.

GASoline71 · 11-19-2019, 08:39 PM

Quote:

Originally Posted by SCOTI

TH350 is the current trans. Looking for a 200-4r or a 4l80e to have built... or .... depending on that cost, it's not out of the realm to receive a 3rd pedal.

Seems the additional cubes tame the characteristics listed on sbc cams according to research. I've been looking up info & 230-235 intake duration is a good call for 400's w/decent flowing heads from stuff/articles I've read .

Ah crud... I missed that you were dropping it in a 400. That should be a great cam for what you intend it for!

Gary

11-16-2019, 11:16 PM	#1
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,910	Lunati EFI Flat Tappet Cams (SBC) Has anyone used one of these cams & care to offer your experience? I was gifted a used 400 from a buddy that passed away last year (817 2-bolt block, dished cast pistons, Dart Iron Eagle 200/64cc, Eddy Perf RPM, 1 5/8 headers, 2.5 dual h-pipe exhaust out of a 71 El Camino). A buddy & I recently tore into the motor & found it's in need of some love. Seems it saw some excessive spray more than once & was missing 1/4 of the crown on one piston (yet still had cylinder pressure when we tested LoL). Since the OE 305/2bbl/th350 in the Bu isn't exactly a threat & gets about 10mpg w/city driving, I'm toying w/the idea of going to a local rebuilders I've used before & get a fresh short block w/flat tops vs. the dished pistons @ no difference in the cost. This is a very budget deal w/parts already on hand & I'll use some new/old AFR 190 Street heads w/74cc combustion chambers. I've been researching cams & when doing the engine calcs, I get within 10hp using one of these Lunati EFI flat tappets vs budget (Howards) Hyd Roller spec cams. The flat tappet approach is <$250; the HYD Roller ~ $725. The one that seems to be the right fit: 280/290 ADV; 230/240 @.050; .489/.520 w/1.5's; 112LSA/108ICL. This would be a 100% 'street/torque' build. No racing intended/expected. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

11-19-2019, 08:37 PM	#4
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,692	Re: Lunati EFI Flat Tappet Cams (SBC) Sounds like a nice mid range combo honestly. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.