Lacajun

iTrader: (1)

---shouldn't it be faster ???? I am thinking maybe 373's might help .....any suggestions ....thanks

My engine w/built a4 and 12/bolt moser 4.11's 26/35/315 micky dr's (new) went 11.71@ 115.5.....1.606 60 ft. went through traps @ 6500 rpm's 3rg gear.I was hoping for low low 11's or high 10's.


408IronBug... 408ci LS1 Shortblock - incl. Block prep, Eagle 4340 Crank,
Eagle H-Beam Rods, Diamond Pistons, ARP Main Studs,
Balanced & Blueprinted,
1 3,600.00 3,600.00T
CC-875-16 LS1 'R' Lifters. High performance Replacement. 1 200.00 200.00T
AFR-1510F LS1 205cc cnc afr's 1 2,150.00 2,150.00T
COM-H1504043S Cometic Head Gaskets 2 75.00 150.00T
SLP-55002 SLP Double Roller Adjustable Timing Chain & Ported Oil
Pump LS1/LS6 GenIII
1 300.00 300.00T
CORE LS1 Short Block and Heads - no valvespings -1 600.00 -600.00T
CC-13755-KIT LS1 1.75 Rocker Kit with 5/16 Guide Plates 1 430.00 430.00T
CC-54-000-11 Keith Craft Custom LS1 cam 1 340.00 340.00T
ARP-234-4110 ARP LS1 head studs 1 199.99 199.99T
CC-26-921K Comp Cams Valve Spring, Titanium Retainers, Keepers and
Spring Seats
1 500.00 500.00T
CC-7955-16 Push Rods - LS1 7.400 5/16 - Stock length 1 130.00 130.00T
FAST-303608 FAST 36lb./hr Fuel Injectors 1 339.95 339.95T
GM-12585671 front crank seal ls1 1 16.09 16.09T
BCA-57080 Bearing 1 18.79 18.79T
MeZ-WP319S WATER PUMP FOR LS-1 1 479.99 479.99T
shipping overnight freight for water pump 1 80.00 80.00
SLP-100221 SLP LS1 F-Body Underdrive Pulley 1 199.95 199.95T
NGK-4177 NGK 4177 SPARK PLUGS 8 1.75 14.00T
GAT-K060763 Gates Micro-V Belt 1 48.99 48.99T
GAT-K040378 Gates Micro-V Belt 1 19.48 19.48T
NFM-8460N Oil Seal 1 14.43 14.43T

99Ls1fever

iTrader: (3)

CC-54-000-11 Keith Craft Custom LS1 cam 1 340.00 340.00T

Where is your cam specs in all of that blah??

if you want to run the times, you need track gears; not street gears IMO. 4.30's and up.

I have been building these cars for 12 years, there is a differance between street car and strip car. You could run 9's in a 408.

hitmanws6

iTrader: (20)

+1 on cam specs, also the 205s seem a little small for a 408, someone correct me if I'm wrong. And +1 on the gears. Some 4.30s would work better for you. I don't see an intake anywhere on there? What are you running?

rem308winvtr

iTrader: (24)

cam cam cam its all about the cam

Lacajun

iTrader: (1)

thanks guys be right back w/specs on cam......I thought heads might be holding it back 2

Lacajun

iTrader: (1)

comp part #54-000-11..........
int ext
gross lft .598 .608
dur @ 50% .234 .240 lobe sep .112

fast 78 mm intake and t/b as far as the gears go ...I was running out of gear with the 4.11's (26 in. Mickey dr's)

hitmanws6

iTrader: (20)

That's a baby cam for A 408, a trex is bigger than that. What's your intake setup?

Lacajun

iTrader: (1)

fast 78 intake and t/b

hitmanws6

iTrader: (20)

As i said in my pm to you, your entire topend isnt even suited for a 346. The heads and cam yes but a FAST 78 is old news. IMO you need to talk to Tony Mamo at AFR, the guys at Texas speed or Pat G to name a few. My friends 402 topend is going to be 104mm Lid, 100mm MAF, Ported FAST 102, AFR 215s or 225s and a custom cam. Mamo speced all of it out for him. The specs are 24x/ 25x .6xx/.6xx not sure about the LSA. Looks like you have some work to do to fix your 408.

Lacajun

iTrader: (1)

thats what i was thinking.....i got a good deal on the car .....it has a cr. moly 10 pt cage and a 12 bolt.The 408 has only 7k miles on it.Dude had 22k in tickets on the car.I got it cheep and I asked the guy why he went w/ the 78 mm set up /205 heads ...he said velocity.........lol.........

any hopes of getn low,low 11's or high 10's(N/A) with out buying new heads

hitmanws6

iTrader: (20)

change your intake setup and add a different cam and you will be there. also what stall do you have? somewhere around a 3800 would be good

99LSS1

iTrader: (12)

You should easily get to the low 11's, High 10's with a better top-end. I would make sure you Spec everything out though!!! Cam. Heads, to go with whatever Pistons you have. Find a desired Compression Ratio. With an A-4, 3:90 gears should be tall enough for you.

99LSS1

iTrader: (12)

Get yourself a Fast 90, or 102, and see what it does. This will be a start without spendig 3 to 5 thousand $. My set-up is running a relatively small cam and mild heads, Ran 11.17 first time out, with some Trans issues. Looking to hit 10.90's next time out.

99Ls1fever

iTrader: (3)

We need to know what compression you are?

Best advice I could ever give you, if I could do a 408 build again which I probabley will. I would have ran VERY high compression 15.1 or higher and run E-85 if I was building a N/A motor. I dont see why you couldnt get into the low 6xx hp range N/A with good H/C/I and 2'' Primary Lt's. Then Put a Progressive 300 shot and you are tickling 1000hp. Just my 2 cents.

I would rap that car out to atleast 7200rpms, if i was racing it.

You need a stroker cam in there, what were your dyno numbers? Numerous people on here have dynoed high 5xx hp 408's mine N/A was 53x and Matts Emplem Pro was 45x something.

Look at how the cams are high duraration to pull in air for the N/A motors:
Popular Stroker Cams:
Texas Giant:http://texas-speed.com/shop/item.asp...d=171&catid=44

Thunder Racing Stroker Series: http://www.thunderracing.com/shop-by...ain/Camshafts/

01SS99red

iTrader: (6)

You def. need a fast 102/102 combo,4.10 gears and much bigger cam and you should see at least high 10s. The heads maybe holding you back im not sure tho. any work done to them?

Lacajun

iTrader: (1)

Was told 525 rwhp....but the guy never came up w/a dyno sheet.It could have just been sales pitch...lol.The car is very clean(as you can see in my album) and only had 60k miles(got a carfax too) 12 bolt moser,cr. molly 10 pt. cage,cold ac,new tires,nx n2o kit w/2 10 lb bottles ,built a/4 and a bad xss sound system.I got a good deal on the car but am new 2 the high tech world.I am 46 years old....sold my 10 sec old school BB 72 nova when I started seeing how fast these cars were... with cold ac... lol.If i can get down to a low 11 I plan on spraying a baby shot to knock it down in the 10's.So keep the info flowing...would like to come up w/something w/out having to do new heads.......thanks to all.

Lacajun

iTrader: (1)

heads have had some port work.....3200 stall....got 4.11 gears...

TurboS10

iTrader: (12)

The OP and I are in about the same boat coming from BBC's.
There's a lot of good info in here head cam wise.
Also, you may need to spend a winter verifying what's in the motor unless it came with receipts.

https://ls1tech.com/forums/generatio...-hit-dyno.html

https://ls1tech.com/forums/generatio...r-215-r-d.html

If your CR is high enough, I'd go with the 243/247 custom cam and flow check the heads if you have the cash left over.
Need to find out who ported your heads also. Plenty of hackers out there.

z28241

iTrader: (13)

OP, I Agree with every reply post!!!! If u do some of the changes to accomodate that build then ditch the 26" tires and run 28"s..i dont think u will run out of gear and trap nicely at the top of 3rd..

hitmanws6

iTrader: (20)

No way you are making 525 OP, mid 400s sounds like its in the ballpark