Guessing Whats Under the Z/28's Hood - Page 24

hjdca · 03-08-2017, 02:08 PM

Quote:

Originally Posted by shaffe

No chance in hell its a DOHC 427, an engine that size would be gigantic in terms of physical size.

Here are the dimensions for the Mercury Racing’s 7.0 L DOHC LSx Engine:

Length (From back of block to front of engine - crank pulley) 27.1 in / 688 mm
Width (Across Timing Belt Cover) 30.25 in / 769 mm
Width (Across Rear of Cylinder Headers) 29.1 in / 740 mm
Height (From Crankshaft Centerline to Top of Throttle Body Motors) 17.1 in / 435 mm
Weight (Without Accessory Drive) 498 lb / 226 kg

I found this on the Corvette forum for the LS7 ---

1. crank centerline to top of intake at 18.5"
2. overall width at the outside of the exhaust manifolds at 28".

shaffe · 03-08-2017, 02:18 PM

Quote:

Originally Posted by hjdca

Here are the dimensions for the Mercury Racing’s 7.0 L DOHC LSx Engine:

Length (From back of block to front of engine - crank pulley) 27.1 in / 688 mm
Width (Across Timing Belt Cover) 30.25 in / 769 mm
Width (Across Rear of Cylinder Headers) 29.1 in / 740 mm
Height (From Crankshaft Centerline to Top of Throttle Body Motors) 17.1 in / 435 mm
Weight (Without Accessory Drive) 498 lb / 226 kg

I found this on the Corvette forum for the LS7 ---

1. crank centerline to top of intake at 18.5"
2. overall width at the outside of the exhaust manifolds at 28".

So, I am guessing to add 6" for the exhaust manifolds, 3" on each side, it seems like this DOHC 7.0L motor is roughly 7" wider than the LS7, 3" on each side ?

Interesting.

Guess I was imagining bigger based on pictures I have seen comparing LS motors to the coyote

hjdca · 03-08-2017, 02:28 PM

Quote:

Originally Posted by shaffe

Interesting.

Guess I was imagining bigger based on pictures I have seen comparing LS motors to the coyote

Not sure... I think my post was wrong, so, I took out my comment... It says Width (Across Rear of Cylinder Headers) and I read Width (across rear of Cylinder heads).... So, I think I added too much for the exhaust manifolds... Instead of adding 3" on each side for the exhaust, it is probably more like 1" or 2" compared to headers... So, the motor could be closer to 4" or 5" wider than the LS7

RLHMARINES · 04-10-2017, 04:38 PM

Looks like plenty of room to fit a DOHC V8 90 degree power plant to me...

Supercup · 04-10-2017, 07:09 PM

That Mercury Racing motor even detained to 650 hp is a great solution for GM for Z/28. NA and 8,000 RPM redline. What is not to like!

big hammer · 04-24-2017, 10:22 PM

NA LT5, 6.2 DOHC 575 hp

View Poll Results: What do you think will power the Z/28? (
Small (5 - 5.5L range) high revving engine	26	8.10%
LT1 with minor power bump (CAI, exhaust, etc)	10	3.12%
Heavily reworked LT1, similar to the LS6 from the C5 Z06; ~500 hp	65	20.25%
Large displacement sucessor to the LS7, ~550 hp	129	40.19%
LT4, same as from the ZL1, CTS-v, and Z06	50	15.58%
'super LT4' with a bigger blower or turbos making 700+	31	9.66%
Other (please specify)	10	3.12%
Voters: 321. You may not vote on this poll

04-10-2017, 04:38 PM	#326
RLHMARINES 1st Civ. Div. Drives: Camaroless for now...RIP "Big SexZ" Join Date: Dec 2007 Location: Savannah, Ga Posts: 2,726	Looks like plenty of room to fit a DOHC V8 90 degree power plant to me... Attached Images __________________ Swift....Silent....Deadly

04-24-2017, 10:22 PM	#328
big hammer Drives: 2002 ws6 Join Date: Jul 2009 Location: manitoba Posts: 1,202	NA LT5, 6.2 DOHC 575 hp __________________ Bolt on 2002 ls1 Trans am--- 11.5 @ 121 (1.72) 2000 da

04-10-2017, 07:09 PM	#327
Supercup Life Is Short Enjoy It! Drives: Original Owner 15 Z/28 #934 Join Date: Sep 2016 Location: S. Cal Posts: 891	That Mercury Racing motor even detained to 650 hp is a great solution for GM for Z/28. NA and 8,000 RPM redline. What is not to like!

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