Back in the game with LQ4 swap
#1
Back in the game with LQ4 swap
New guy to the forums and have been out of the fun-car game for over a decade. Recently decided to dive back in and do an LS swap into a BMW 330Ci for a street and road course car. I picked up an LQ4 out of a junkyard 2007 Silverado 2500 Classic for $350. It is complete from pan to intake including ECU. It will fire up but the downside is a spun main bearing.
The crank also is trashed so I'm in for a new one and while I'm at it I'm going with forged rods and pistons. I tore down everything and will be taking the block and heads to a shop this week to get machined and cleaned up. Block getting line-bored to fix the spun bearing, then the usual clean up, decked, honed cylinders (bores are stock and good shape), new bearings, etc. They will also be cleaning and rebuilding the 317 heads, then assembling the short block.
Does anyone have any ideas for a cam, lifters, and springs that could net me about 450hp at the crank? Don't want to push it too hard (mechanically or budget) and, frankly, with the car getting stripped to about 3,000lbs with driver I don't think I need much more.
The crank also is trashed so I'm in for a new one and while I'm at it I'm going with forged rods and pistons. I tore down everything and will be taking the block and heads to a shop this week to get machined and cleaned up. Block getting line-bored to fix the spun bearing, then the usual clean up, decked, honed cylinders (bores are stock and good shape), new bearings, etc. They will also be cleaning and rebuilding the 317 heads, then assembling the short block.
Does anyone have any ideas for a cam, lifters, and springs that could net me about 450hp at the crank? Don't want to push it too hard (mechanically or budget) and, frankly, with the car getting stripped to about 3,000lbs with driver I don't think I need much more.
#2
Matt, punch in 450 hp lq4, or something similar, in the search bar at top right corner of page, theres some reading to do there, then you will come up with some questions, that may help you get some feedback.
#3
Will do. I figured that would be the case but thought I'd throw it out if anyone had something off the top. The car is going to see double duty as a weekend street fun and occasional road course so longevity and handling mean more than raw dyno numbers.
#5
It really depends on budget. Obviously things like headers, exhaust, and cold air intake are pretty normal. To get you to the 450+ power level at the flywheel a camshaft swap will no doubt get you where you want to be. If you still have money for more mods a set of CNC ported heads would help even more.
__________________
Aaron @ Scoggin Dickey Parts Center
Email:Aaron387@sdparts.com
Phone: 1-800-456-0211 Ext: 324
Aaron @ Scoggin Dickey Parts Center
Email:Aaron387@sdparts.com
Phone: 1-800-456-0211 Ext: 324
#6
It really depends on budget. Obviously things like headers, exhaust, and cold air intake are pretty normal. To get you to the 450+ power level at the flywheel a camshaft swap will no doubt get you where you want to be. If you still have money for more mods a set of CNC ported heads would help even more.
#7
A 408 will definitely make a nice addition to the project. Let us know if there is anything we can help with.
__________________
Aaron @ Scoggin Dickey Parts Center
Email:Aaron387@sdparts.com
Phone: 1-800-456-0211 Ext: 324
Aaron @ Scoggin Dickey Parts Center
Email:Aaron387@sdparts.com
Phone: 1-800-456-0211 Ext: 324
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#8
In the meantime I'm bouncing around my not-so-fancy Excel spreadsheet of where build money needs to go. It's like a shell game on there, and I keep coming back around to the same point in my head. So I'm going to throw money mainly at the bottom end and cam, with a couple add-ons to the stock heads. I figure as long as I build that right I can upgrade heads and intake later on.
For the bottom I've decided on:
Wiseco flat tops
TSP or K1 4.00" crank
TSP or K1 rods
Stock replacement main bolts
Cam Motion custom grind (based on a very informative call to them)
Keeping the heads as stock for now with the exception of dual springs and a Straub Technologies trunion upgrade to maintain stability at RPM and handle a larger than stock cam.
The car is only going to be 3000-3200lbs with driver and gas so this 408 ought to move it down the road pretty handily.
#9
And just because pics say a lot, I'll throw a couple in
As purchased for $350
Came out of a truck that saw a lot of dirt and no cleaning. And it sat out in the open for awhile as well.
This was the intake lifter on the number 3 cylinder. After looking at the internals I think the main problem was an oil pump failure.
Number 2 main. Machine shop says they can salvage it with a line bore.
Crank was iffy at best, and is probably bent anyway. Screw it...408 it is.
As purchased for $350
Came out of a truck that saw a lot of dirt and no cleaning. And it sat out in the open for awhile as well.
This was the intake lifter on the number 3 cylinder. After looking at the internals I think the main problem was an oil pump failure.
Number 2 main. Machine shop says they can salvage it with a line bore.
Crank was iffy at best, and is probably bent anyway. Screw it...408 it is.