xxcov3rxx

iTrader: (1)

found an LQ4 and put it into a blazer and spun main bearings, rod bearings, crank is junk, rods are out of round... So now i'm going for the stroker. Plan is 408 stroker with a TSPd rotating assy.

This is for a daily driver with multiple trips to the track throughout the summer with plans on spray. i will have A/C and would like to keep it fairly sleeperish.

1. which cam would best suit my needs (i like the one i have now, but i know there is a lot of improvement to be had)
2. will the 317 heads hold me back or should i spring for a new set?
3. what compression ratio should i go for. i would like to stick with low to mid grade pump fuel.

Parts on hand:

LQ4 stroked to 408 (line bored, all bearings replaced, decked)
LS6 intake with fuel rails and TB
317 heads
comp 918 springs
LS1 XR265HR-15 (212/218 265/271)
Sanderson headers
2.5" dual exhaust with DMH cutouts and a 30" magnaflow

Parts i will be ordering:
TSP 408 rotating assembly
TSP ported LS6 oil pump
LS7 lifters

as soon as i figure out what what compression ration i will need then i can pick a wiseco piston...

I would appreciate all advise. I called TSP today, but didn't really walk away learning anything... and thats why i am here.

garygnu

you mite need bigger injectors.the 317 heads will work,mite not need any milling .look at some comp LSr cams,54-455-11 more torque then the one you have..maybe get consider some pac 1218 or 1518 springs.and also consider some compcam trunnion bearings .

xxcov3rxx

iTrader: (1)

Thanks for the advice. If i did use the 317 heads i didn't plan on milling, due to the fact of deciding which piston to choose for the CR.

Never thought about the trunnion bearings.. any one have good luck with these?

xxcov3rxx

iTrader: (1)

Any suggestions on compression ration for mid grade fuel? suggestions for pistons...

xxcov3rxx

iTrader: (1)

**UPDATE**

Here’s what I got going in a 4 door blazer with a Silverado 4L60E/Trans Go HD2 kit and stock rear end with 3.73 gearing. Going with the sleeper look with stock body and lowered with ZQ8 wheels. Need a recommendation for a cam that idles like stock with A/C and possiblity of spray, but puts out power while DDing.

Motor is as follows

LQ9 Iron Block
Diamond Pistons -4 Valve relief
Total Seal Rings
Eagle 4.00" Stroker Crankshaft
Eagle H-Beam Connecting Rods w/ARP rod bolts
Cam bearings installed
Clevite " H " Race Rods & Main bearings installed.
Fully balanced / Line honed block.
GM galley plugs / coolant plugs / oil plugs installed
Plasma top rings
Ported 243 heads with patriot dual springs good to .650 lift (flow almost 300cfm at .600 lift)
LS6 intake, TB, injectors
TF Chromemoly 7.4” push rods
LS7 lifters (still deciding)
TSP LS6 high flow oil pump
Timing chain (would like recommendation)
Cam (would like recommendation)

Reccomendations would be greatly appriciated... trying to figure out comression ratios, but having a hard time.

What do you guys think?

xxcov3rxx

iTrader: (1)

Thinking about going with an MS3 cam with 114 LSA... Waiting for TSP to get back with me on their suggestion.

Marcello7x

iTrader: (10)

get a stroker cam or custom grind.

Silver408z

iTrader: (1)

As far as cam goes your cam is REALLY small for a 408. If you want a small cam for a 408 go with something in the 23x's range.

The heads will work but you are going to leave alot of power out there. There are lots of budget friendly heads out there that will give you much better power gains. TSP has lots of budget friendly heads.

I dont know much on how octane effects compression. Octane of the gas is also going to effect how much timing you can put into the tune. If you are ok with mid grade then you are only looking at maybe $3.00 more to fill up 15 gallon tank with premium vs mid grade. Just go with premium and save you and your tuner lots of head aches.

The ls6 is a good intake. If you are on a budget stick with it, if not upgrade to a fast of some sort.

Marcello7x

iTrader: (10)

Id like to know a good CR for a stroker as well! Getting my info together for a custom cam, and haven't decided how much to mill my heads yet.

xxcov3rxx

iTrader: (1)

Thanks for taking the time to give me your .02 silver. Well, I got some updates. Plans have changed... Motor and bottom end will remain the same. top end has changed. Give me your thoughts. After thinking about it, I’ll probably either do midgrade or premium. What’s another 3 dollars for some good gas?

LQ9 Iron Block
Diamond Pistons -4 Valve relief
Total Seal Rings
Eagle 4.00" Stroker Crankshaft
Eagle H-Beam Connecting Rods w/ARP rod bolts
Cam bearings installed
Clevite " H " Race Rods & Main bearings installed.
Fully balanced / Line honed block.
GM galley plugs / coolant plugs / oil plugs installed
Plasma top rings
Stock L92 Heads with lightweight LS3 intake valves
GM Performance head gaskets compressed to .051
Stock LS3 intake
NW 90mm DBC TB
TF Chromemoly 7.4” push rods
LS7 lifters
Stock LS6 oil pump
LS2 timing chain
COMP Cams spring kit 26926TS-KIT
25% underdrive pulley – powerbond
227/235 .639 .621 114LSA+2 LSK/LSL lobes
Trans Specialty TQ 2800-3200

Any suggestions are appreciated. This should put me right in the range of 10.9-11.2 CR. Depending on what CR calculator you use… any HP guesses?

ocls1

my setup will consist of a custom cam callies crank and rods diamond pistons stock thickness gaskets with 317s that are ported and milled to 68cc should put me around 11.3.-11.5 CR


I would do the l92 setup if you have the $ for it no doubt! im just trying to figure out why the small cam?

xxcov3rxx

iTrader: (1)

Heads and intake are already sitting on the table... I picked the cam based on the fact that I want nice down low torque and to be able to daily drive and not worry about traffic with the A/C on. As far as I know I shouldn't have a problem with this setup. What’s a medium sized cam to you for a 408?

ocls1

I would do a TSP TX GIANT CAM !

I aswell was going to go with a MS3 but they said it was to small

ocls1

Or possibly Thunder racing "sTRoker" - 244/248 - .612/.615 - 112 lsa

xxcov3rxx

iTrader: (1)

how about a 236/246 .590/.578 115 LSA loads of torque and has great drivability... really don't want a lopey cam and thats where i get hung up.

odarabla

iTrader: (1)

You could try the size cam I have for my 402ci 246/255-605/632@113LSA

What you think?

xxcov3rxx

iTrader: (1)

I think choosing a cam is my hardest decision... as is with most other people... i also think that there is no need for me to go that big and still pull good numbers out of this stroker. how does this cam perform for you and what do you have with it?

odarabla

iTrader: (1)

This is a custom speced cam for my setup. This is almost always the route one should take. Geoff speced this cam because of the heads/ converter/ gear and weight of my car. The car isn't a daily driver but it is a street car. The DCR on the motor is 12.3-1 and the redline will be some where around 7400rpm. We needed to spin the motor a little higher due to the way the car was setup. If you want a cam for your build get one speced to your needs.

Just a thought..

xxcov3rxx

iTrader: (1)

Right on man, you right... I'm going to have to get a hold of someone and get one speced so that i get the most out of this motor. the las thing i want to do is put one in and regret no going bigger.. or smaller... or whatever. thanks for your help

Silver408z

iTrader: (1)

That looks much better. The ls3 topend will help you make much more power. I cant estimate the power you will make but it will be much better with a ls3 setup vs the 317 heads and ls6 intake. Keep in mind your an auto and it is not going to make high dyno numbers.

I think your cam choice is good for the things you are after as far as driveability but I am not a cam expert and the l92/ls3 heads take a little different cam pattern than cathedral port ls1/2/6 heads. Get with the shop you are buying your cam from or even call someone like comp cams to help with your exact cam best for your setup.