HAS ANYONE ELSE PURCHASED THIS CRATE ENGINE FROM SDPC, ITS A 350 WITH THE VORTEC HEADS/INTAKE AND THE HOT COM. IM CURRENTLY HAVE IT IN MY GTA. I TOOK IT TOO THE TRACK ONCE. OUT OF FOUR RUNS MY BEST WAS MY LAST RUN, A 13.8 IN THE 1/4.I KNOW JUST AS IS I COULD DO BETTER MAYBE A 13.4 SO IM NOT THAT DISSAPPOINTED BECAUSE IT STILL NEEDS A CUST CHIP, SLICKS MAYBE SOME GEARS. I STILL HAVE THE ORIGINAL PLENUM AND RUNNERS . I WANNA KNOW IF THIS IS A GOOD ENGINE AND WHAT OTHERS ARE RUNNING.

 

you are running better then me i have a fresh 350 with a lt4 cam not the hot cam with fastburn heads sdpc lower slp runners and stock upper and t/b i was running a 14.5 at 99.97 still have the stock chip my posi went bad on me the first launch so i was spinning some got a ls1 rear with the torsion posi makes the auburn look like a toy with 3:73 should help but the motor will pull up to 6500 maybe more but thats as far as i took it i think the stock chip and the intake is killing it i have a new mini ram 3 sittin till after the rear is done then custom chip time plus i think the 700r4 is on its last leg i guess its a good time to get a t56!

 

Just to put everything into perspective.

Stock L98 short block
Stock L98 Cam
untouched used Vortec heads, 1.6:1 RRs
TES Headers, no cat, Dynomax IPipe and '02 Camaro SS Muffler
Shift Kit, stock TC stock gears 3.23:1
Boxed LCAs, PanHard and TQ Arm
SLP CAI, Stock MAF, Ported Plenum, Ported OEM Runners
Custom Tune by me!

Car runs 13.6-13.9 @ 99-101 MPH with a best of 13.34@103 MPH.

On street tires with good track prep I get 1.91-1.94 60ft

You cars with a Hotcam should be atleast 2-3 MPH faster then me all else being relatively equal.

Race weight 3750 with me in it.

 

hey poncho what do you think is the problem with my motor set up the car feels like it lost a lot of bottom end torque but it pulls very hard up high as you can see from my 99.97 speed but it should be in the 13 i would think

 

Can't really say, but your car is not at its potential, that's obvious.

Also what were the track conditions and elevation?

Maybe your torque converter?

How are your 60ft times? Any suspension work done?

The key to quick ETs is getting as much of the power to the ground as possible.

Also the LT4 cam is designed for a higher RPM intake with much less TQ then a L98 comes with. Maybe the cam is simply working as designed, but mismatched to your setup...If that's the case then you'll need a higher stall TQ to get you moving off the line.

 

Just to put things in perspective...

Stock LB9 short block (thats a 305)
214/224 cam
port matched aluminum L98 heads 1.6 RRs
Edelbrock TES headers, Edelbrock cat back
stock chip, stock suspension, street tires

13.9 @ 93.5mph with 2800rpm stall converter 1.9 60ft

broke the automatic now we go

14.1 @ 98.5mph with Tremec TKO600 and horrid 2.2 60ft.

jsut bought slicks, should be in the mid 13s now

Also look up mw66nova, Tim Burgess, TunedPort335, SittingBull, and Willie, they all are running 305s.

 

between the auto and manual swap was anything else changed?

 

what do u guys think a 350 vortec hot cam with a super ram run in the 1/4. with some sticky tires. 13.8 so far with stock runners and plenum and street tires.

 

The only things changed between the auto and manual swap was the fact that I have a severe traction issue with street tires now, and based on my trap speed it appears that I gained roughly 30hp at the wheels. I was only able to cut a 2.2 60 ft slippin the clutch pretty hard to keep the tires hooked. I have slicks now I just gotta get my car to the track. We will see what it runs with traction. With the slicks I can dump the clutch at 5000rpm and spin for about 8ft.

 

i should have my new rear done this weekend so i might be able to get to the track on sunday i have stock suspension for now i do think that the cam an intake are mismatched thats why i got a mini ram i got a good deal on it or i would have went HSR. i just don't know why my performance is so far off of RGV 89 GTA hes got the hot cam which is the race version of my street cam but it was made for higher rpm power also my timing could be of a bit to where do you think it should be set at with aluminium heads also im running slp's ls1 #25lbs injectors at 50lbs of fuel pressure

 

Stock runners and no tuning - you are giving up alot

I'll say it again - vortecs will not run well unless they are tuned, the fueling and timing are totally different than a stock L98- no kidding you could be losing 30-50HP (flywheel) maybe more.

a stock chip will have not enough low end timing, and way too much WOT timing - in some cases 10-15deg off of optimal for vortecs.

It will run different once tuned- try Turbo city - don't use PCMforless- if you need a tuner.

Ask poncho how his car ran on a stock chip.(probably not to hot)- if you have 25lb injectors on a stock chip you will definetly have problems (running way to rich in the wrong places in the power band) even on a corrected inj constant - and no change to fuel you will still be missing power.

Try a tune and get some good runners/ 52 mm tb - you will see gains withthis set up.

 

During a tuning session at the track, I went from 14.2@97 mph with a relatively stock tune to 13.7@101 mph making changes to fuel and timing.

Total timing for my setup is around 29.

I still haven't had a chance to go back with my WB setup and fine tune, so there might be something left still, but unlikely as mar car runs really well overall.

Total tuning took me most of a summer to get done, but that was with a years fine tuning my relatively stock setup before that, so there's alot involved in tuning your car, and no off the shelf chip can get it as close as your own patience and trials can.

I for one fully recommend learning how to burn your own chips and doing so.

 

that motor wants to rev to 5500 rpm, when the tpi is only allowing it to rev to 4800~. Port the hell out of the plenum, get a new base and some SLP runners and that would shave off half a second easily. Let that engine breath!

 

I was in the process of installing SLP runners(just this week), but they don't clear the SDPC Vortec intake. Did anyone else install SLP runners on a SDPC Vortec base? If so what did they grind for them to fit...it's the passenger side I am having the problems with.

Truth be told, I plan on selling my SLP runners, so I won't touch them and I plan on reinstalling my stock runners tonight.

I don't plan on leaving this engine in the car much longer, I am working on dropping in a Pontiac 400 next year into my GTA, so at that point the heads, base, roller rockers, headers and anything else I won't need will be up for sale.

I've had fun with this setup, but I am a Pontiac enthusiast at heart, and I need to put a real Pontiac engine in my car.

 

i have them on my car as said in my first post mine cleared everything fine didn't touch a thing. besides ajusting the timing and fuel pressure im lost in tuning my car i have know idea where to start or how i have seen custom chip guys that say tell me what you have done and i will burn you a chip thats it.

 

You know what, with that simple response you convinced me to give them another try. Turns out all I needed to do is loosen the fuel rails and lift them so that runners fell into place, then simply retighten the fuel rails....excellent...


Now all I need to do is block of the hole for the 9th injector on the drivers side runner. I'll get that done today and install them tonight.

Saturday I'll head to the track, There's a local FBody club here that has a track day scheduled for this Saturday, so that will be fun.

 

I just ran out and found someone to weld up the hole for the 9th injector, so I will be good to go. The runners will be on tonight.

I will be at the track on Saturday and this will shed some light on the power increase or lack there of with the SLP runners!

 

OK I got results from the SLP runners install.

Now my car has run a best of 13.34@103 MPH but with an insane tailwind and very low DA. That same day a buddy who runs consistent 113-114 mph was running 117, so that was a freak day.

Other days at the track have netted me a 13.6-13.99 @98-101 MPH depending on DA and tail wind. All my runs over 100 MPH had some sort of tail wind, and the higher my MPH (like 101) the stronger the wind (measurable)

Now here is a excel sheet comparing to similar DA days, only difference is wind speed and direction and the install of SLP Runners.

On July 23 DA was a little over 300 feet and there was strong tail wind early in the day (15-20MPH) that died down to about (5-10MPH towards the evening, explaining why I had less MPH as the day wore on. Today (Sept 24) DA was around 250 feet and there was no wind to speak of. First run came only minutes after the track opened so there was no track prep at all. After that run I waited for the track prep and continued. Car run over 100 every run, and ran very consistent. Best MPH for the day was 101.786 with no tail wind, compared to 99.763 with a small tail wind.

My conclusion is that I picked up 2 MPH with these runners. I am sure on a day with some tail wind I will be aproaching the 103 MPH mark that I hit only once before with insane tail winds.

Copy and paste into excel to view easier.


Date Time 60ft 1/8th 1/4mile MPH Lane Note
7/23/05 15:53 2.126 8.968 13.956 99.718 r ttops off
7/23/05 16:29 2.08 8.955 13.959 100.144 r tail wind
7/23/05 17:14 1.965 8.749 13.711 100.711 r tail wind
7/23/05 17:43 1.98 8.758 13.697 101.088 r tail wind
7/23/05 17:55 1.945 8.749 13.731 100.181 l tail wind
7/23/05 18:44 1.932 8.79 13.796 99.763 l less tail wind
7/23/05 19:19 1.966 8.858 13.909 99.322 r less tail wind
7/23/05 20:15 1.957 8.841 13.899 99.216 l less tail wind
7/23/05 20:50 2 8.927 14.092 93.709 r let go
Average 1.994555556 8.843888889 13.86111111 99.31688889

9/24/05 13:31 2.191 9.074 14.098 100.5 l spun a lot 3 no track prep done yet
9/24/05 13:39 1.934 8.731 13.747 100.562 l shifted drive
9/24/05 13:46 1.948 8.765 13.762 100.794 l shifted 2-3 higher
9/24/05 14:32 1.91 8.722 13.708 101.494 r shifted 1-2, 2-3 higher
9/24/05 15:11 1.919 8.722 13.698 101.786 r shifted 2-3 higher
9/24/05 16:02 1.925 8.752 13.745 100.743 l shifted 1-2, 2-3 higher
9/24/05 17:19 1.919 8.753 13.764 101.756 r shifted 1-2, 2-3 higher
Average without first run 1.925833333 8.740833333 13.73733333 101.1891667

 

i have this engine and am VERY happy with it.

no track time yet but.......

have run everything thing from an audi s4, honda 2000s, ford lighting, any generation including modifed mustangs, lt1s etc and beat them all on the street.

the ONLY car that had me by 1/2 a car 0-70mph was a modifed ls1 ss camaro. that was before when i had the wrong fuel pump in the car. it was also before i gutted the cat, ported the plenum, upped the timing a couple of degrees, and cut the air boxes on the intake. would like to try him again. pretty sure i would win now.

do you have headers? 2.5 or 3 inch exhaust? any suspension mods to put the power down? 52mm or larger tb? and yes port the h e double hockey sticks out of the plenum and make sure the gaskets don't restrict air flow either. also adjust your fuel pressure and see where it runs best. YOU HAVE A LOT OF HP ON THE TABLE, get it in the car and to the ground.

best of luck and let us know when you hit 12s

as for slp, i spent the better part of 2 days trying to get them on. used a dremel tool and still no luck. so i am still running stock runners but the ported the plenum. (yes it made a difference)

 

To get the SLP runners on I had to remove the valve covers and lift the fuel rails, once I did that they went on easy.

Now I need to take them off to port them!

 

i hear ya. i just got so pissed after all the time i just ported the woole thing including the gaskets (man the overhang a lot) and put it back on. it does seem to pull a little better after 4500rpm.

think i'll wait and go with the HSR.

thanks!!

 

RGV...

i will try to find it but i believe someone in the car mag ran a 11.7 with the HSR and a similar engine. now THAT would put a smile on yer face

lemme look and i will try to post it tomorrow........
previous engangemnet tonite, my wife wants to go to the movies. i got lucky it's not a chick flick.

L8r

 

I didn't buy that motor but I built one with all the same parts. I have SLP runners and edelbrock headers. I have yet to tune it to its best but its running pretty good off a mail order chip. My best run so far is a 13.2 @ 103. 60ft time was a 1.8

 

congrats!! sounds like you are on your way to 12s.

man you gotta love that torque.

with a 1.8 i would think you should be a little quicker in the 1/4. have you done any work to the plenum etc? how bout larger tb?

 

Just so I understand properly

350 Shortblock
LT4 HotCam
Vortec heads
SDPC Vortec TPI Base
SLP Runners
Edelbrock TES Headers

What else do you have?

I am curious because I still have all of the above minus the cam and I run 13.7@101 mph with a tail wind assisted 13.34@103 best.

 

very nice.

i have the complete sdpc vortec engine.

i have 2.5 in exhaust, shorty headers, 52mm tb, ported plenum, gutted cat, hooker exhaust, lca, panhard bar, eibach springs, 24matched injectors, holley afpr, k&n filters, modified cold air intake, custom chip (although it needs more work), rebuilt with kevlar 700r4 ( u can chip a tooth when it hits second) and underdrive pullies. i think thats about it. anyway all i have time to list now.

the reason i made the comment about your 60 time was when i was speaking with Brian at scroggin he was running a 1.8 and also hitting mid 12s in the 1/4. he had the "original" engine.

he was running a 3.73 gear and a 3000 stall too.

 

finshed up my 9 bolt to ls1 rear swap the other night went out for a break in run but my car was missing bad i think it is only running on 7 cylinders backed the timing of some and the fuel pressure but i think it made it worse checked the plugs they all looked good any thoughts?

 

once my car had a demon. took me months to get it fixed. i ran fine cold but when it got warm it would miss and back fire like crazy and run about 25mph. after months and hudreds of dollars turned out to be the ignition coil. good luck!!

so it was fine before the swap? and also how long did the swap take? any problems?

 

So heres everything thats done with my vortec motor.

355
Vortec ZZ5 Heads
LT4 Hotcam
SDPC Base
SLP runners
SLP 25lb injectors
Edelbrock Headers
Banks Cat Back exhaust
GM "S-10" torque converter
1.6 comp pro mag rockers
Formato faster prom chip
Everything is ported: heads, base, runners, and plenium

All stock suspension and its the original transmission and stock TB and all emmission crap is still on the car down to the air tubes

The car runs good now with the chip but it just falls on its *** like 3/4 way down the track. I need to get it tuned a lil better and I am going to next spring by LSRacing Chips. Local tuner here so he will be able to get it pretty well perfect and Im pretty sure the car will run 12's after that. my best 60ft time of that day was a 1.85 and that was on another 13.2 pass. Had nothing higher then a 13.4

 

NICE!!!

gears and stall?

gut the cat if you can, you will be pleased. i was shocked at the difference. everyone said it wasn't much, well sure as heck was on mine. and it was a high flo cat too.

played with the timing and fuel pressure? should get you those 2 tenths.

may want to look at a 58mm tb. i got a 52 and wish i had gotten a 58. oh well.
when i went to port the plenum i was shocked at all the restricions in the front. i must have ground on that thing for an hour and half and that was just the front!!

suspension work will help you put the power down too. mine sure felt better after. the strut tower brace seemed to really help. i was suprised it felt so solid afterwards. the lca sure keep the suspension in place. worth a look and not to expensive.

i also did the heat by pass on the tb. i thought why not? i can't hurt.

bet you have embarassed a few people at stop lights

 

Gears are stock 3.23 and the stall is about 2100.

I have embarassed many ppl at light and many of them are very suprised b/c everything on the outside of the car is stock so you can't really tell its just alot louder and you can hear the cam. I was going to play around with the timing and the fuel at the track when we went that day but like I said before I have all the emmisions crap still on the call so it was basically impossible to get in the back and change it without ripping alot off and I just wasn't in the mood at that point. I have always thuoght about goig with 3.73 but have had mixed reactions on it. I suppose the only way i will do it is if the rear end blows out. Acutally about the cats my dual cats just went like 2 months ago and I bought some catco ones so that is whats on there now. I have done the throttle body bypass as well and of what a difference just by touching it after the has been run for a while its warm but nothing like the extreme heat is was before. The only thing that I have touched on the suspension is i put new shocks on the rear everythnig else is bone stock. hopefully I see those 2 tenths go b/c after I hit a 12 I will be etremely happy.

 

I have almost the same combo(see sig)

running stock 3.23 9bolt/w a 2200 stall - the car can spin or hook depending on throttle control , but will launch pretty hard.

Just to add, I really like this motor, sure some combos make more power, but still if you think about it, it's almost a factory set up with the hotcam , and vortecs( meaing there shouldn't be a bunch of long term reliability issues)

The torque is great, and when tuned mine pulls/ sorry revs to 6k pretty easy. No it doesn't have the top end of my LS1, but it makes almost the same power just alot earlier, which is not a bad thing on the street. stoplight to stoplight it would eat the SS(6spd) on the freeway over 100 it would be a different story(SS all the way) however I once pulled a convertible 2002 SS to 120 - and he was trying.

Just driving home that this is a legitimate combo. I am happy with it, and like driving my car now way more than I ever did before. The modified tuned port, along with some mild chassis/ brake mods make quite a unique street machine.

And it's nice to know you can give most all of the new cars a spanking at will, save for a handful of the new generation of muscle cars - (SRT8,C6,GT2/3 which all will hand you your A** in most situations) maybe not?

Vortec+hotcam+tuning=

 

sig

 

Kennerz, u ever been to the track with the car?

I still am running the stock cam, but are considering a cam swap to the HotCam, but I really enjoy the charaterstics of a stock cam like now, that's my hesitation.

Yesterday I took my car for a spin with the wife through some twisty country roads, man the car felt great! Power when I need docile otherwise. How does the Hotcam feel?

 

I have the same car. Check my signature for comparisons. I expect to do better with the cooler weather and the mods I have added. More in the future. Tracks will make a difference. Mine is at an elevation of 1200 feet and is not known for the best of traction. California Speedway in Fontana.

 

Maybe some help here...

https://www.thirdgen.org/techbb2/sho...hreadid=267022