Daz

iTrader: (1)

Part Number 08-306-8
305ci-350ci
Grind Number CS 290H-R12
Gross Valve Lift0.51 / 0.54
Duration At 0.006 Tappet Lift 290/307
Duration At 0.05 230/244
Lobe Lift 0.34 0.36
Lobe Separation 112
Recommended Valve Springs 987-16 \

Do I have to change to SD with this cam?What are will be the bottleneck on the stock programming..Ill be burning chips eventually but Im still on the learning stage..Does this cam has a remote chance of working with my MAF?Im currently using the next level down cam 08-305-8(220/230@.05 .510/.510 lift 114 LSA)and its very very docile..

383 10.4:1 comp,Scat crank etc..(safe up t0 6500 RPM),TFS G1 heads (bowl work 5 angle valve/seat job),recommended springs for the 08-305 cam,.200 longer pushrods,Crane Gold 1.5 roller rockers(non-self aligning),TPIS Bigmouth intake,Superram,52mm TB,1 5/8 heddman shorties,gutted cat,2.5" Dynomax cat back(superturbo muff),S10 torque converter rated at 2200-2400 but flashed at 2800-3100 RPM on different dyno runs,shift kit etc,3.27 rear gear..Car is an 87 IROC stock suspension,MAF,stock computer/chip(weighs around 3800 lbs)..

Daz

Grumpy

Very very docile?.
Are you using the stock injectors?.

SD would be your best move in my opinion. The real limit is how much work you're willing into getting it right.

Do you have any scanner info., from what you've got?

Daz

iTrader: (1)

I was using the the stcok injectors at 55 psi but changed it to 30lb SVO's..Ran good,no pinging (not like before) and idles steady at 700 RPM..no scanner but a bunch of Dyno runs with the 22lb injectors

Daz

Grumpy

In your sig line it says stock ecm/chip.
This ain't adding up
Your running 30#ers with a stock chip and having it run well?

Daz

iTrader: (1)

believe it or not ..YES..no dyno runs on with the new injectors but timeslips are a bit better than before..Only problems Im having after the swap is the inconsistency of the runs at the track..There are time when it would run good,plugs are clean on 45 psi but sometimes it would be too rich..I have to change the pressure 3 times in 3 instances of racing..I would run almost the same times but my fuel pressure would all be different..Only changes that I know of would be the temperature outside

Daz

Grim Reaper

If your car was an SD I would suggest modifying the MAT Inverse Delta Multiplier Table. This is the ambient air temperature correction table for the MAT. This is ESPECIALLY important if you run a relocated MAT.

With MAF, I have not been able to find any such correction table. Mine belief is the MAT for MAF only controls the EGR. The MAF Scalar tables may be where you need to make the necessary adjustments.

I noticed the MAF Scalar tables for the ARAP BIN are different than stock MAF BINs ($6E TDF). Maybe you should try using the same entries for the MAF Scalar Tables as the ARAP as your starting point. It appears the changes are only subtle, but have a major effect. Be careful on the adjustments.

Are you sure you wouldn't like to look at SD? I think the VE Tables are actually easier to calculate a correction for once you get the hang of it.

Daz

iTrader: (1)

Thats a little too much for my scope but IM cutting and pasting it for future reference...

I would switch to SD but not for a while,I just need to know the chances of this cam being undrivable/unbearable before I switch

thanks

Daz

GregWestphal

iTrader: (1)

With the extra cubic inches from your stroker crank, your engine would like the bigger cam, especially since the "305" cam is acting docile. Traxion has a 230/245 cam in his 350 and has it idling pretty well, but he's also using SD and a good bit of experience in working with it. If you get into burning your own chips, you could make that cam work with the MAF setup. A better cam might be something with similar specs but from the Xtreme line and a 114 LSA, with the wider LSA helping smooth the idle out and even extending the powerband some. I know some 4th-gen guys with cams this size in their 350's passing emissions with no problem, partly because of the wider LSA.

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Greg Westphal
'87 IROC 355TPI/A4

branz28

I agree with Greg, there's a guy on one of the boards with a 427 LS1 from ARE i believe. He hits low 10's in the 1/4 without the bottle or other adders has a similar cam and all, still passes emissions....I believe the LT1 guys are doing the same with their 396's. Then again, i'm just amazed at some of the cam's these guys are running...look like tree stumps.

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-700R4 (Rebuilt) Too much done to actually list
-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)
-MSD 8.5 mm plug wires
-Gutted cat
-!AIR
-Gutted Air Boxes