88fastgta

iTrader: (9)

so i have the money to buy the afr 180 heads. i want to get rid of my boat anchor l98 heads... . i have several questions also...

IN STOCK!!! The following part numbers are in stock, on our shelves, ready to ship:
AFR# 0911 - 180cc Heads, Straight Plug, 75cc, .600 lift
AFR# 0916 - 180cc Heads, Straight Plug, 65cc, .600 lift
AFR# 0917 - 180cc Heads, Angle Plug, 75cc, .600 lift
AFR# 0918 - 180cc Heads, Angle Plug, 65cc, .600 lift
AFR# 0919 - 180cc Heads, Angle Plug, 72º Intake Bolts, 65cc, .600 lift


1. currently i have a 97 vortec block and 88 l98 iron heads with a edelbrock/slp tpi combo which part number fits best my build

2. right now i have 1.5 rockers.... would i benefit with 1.6 with these heads and a gm hot cam or should i stay with my 1.5... 1.6 rockers would bring my lift up to .525 .525 with my hotcam...

3. if i wanted to still use my comp cam 1.5 self align rockers can i take the guide plates off the afr heads and use my current rockers... dont wanna spend the extra money for non align rockers...

4. would i notice a huge gain all across the board with these heads....


5. currently my compression ratio is 9.7 to 1 and thats with iron heads... can i mill the afr heads to 58cc like stock 113 heads and up my compression to 10.1 to 1... would that benefit me i always run 93 octane gas...


6. would afr 180's, gm hot cam a ported edelbrock/slp tpi be a good street motor.... let me know...


thanks in advance..

Burnout91

I got pretty good results from stock '91 L98 short-block, worked-over SLP runners, slightly worked-over plenum, port-matched Edelbrock base, AFR 195 Eliminators (p/# 1034) milled to 62cc chambers, Comp 268XFI cam, Dyno Don headers & exhaust, and a tune by Kevin91Z. 320 rwhp / 377 rwtq. There is a graph of the dyno run, I believe inthe thread "Third Gen dyno day 2/16/08."

Bill

Orr89RocZ

iTrader: (20)

I would go 1.6 rockers and get non self aligning as I believe AFR's use guideplates on the 180's and the pushrod slots are just gapping holes so the guideplates were necessary, atleast on the 195's they are.

Sell off the 1.5's you have to fund the new ones.

Ask AFR how low they can mill but they may beable to hit 58cc. Manifold may need slightly milled tho if it doesnt line up on the block. You'd have to check once the heads are milled.

Milling will help alot tho. 10 to 1 with the hotcam is capable of 91 octane with medium agressive timing table. heck it may run on 89. 93 would give best results tho.

Hotcam is one of the most popular street cams for a 350 motor. LT1 guys run this cam or the CC503 cam alot for a nice street setup with good power. 180cc heads will compliment it well and give huge gains across the board compared to stock heads. Depending on how well that base and runner setup is ported I could see 30whp gain everywhere with the headswap. The big thing wont necessarily be peak power but power across the rpm range from idle to peak torque to just below peak hp rpm. Those are nice gains and will be felt

hotcam/L98 heads/TPI is proven 320-330whp setup. AFR heads should give close to 350whp peak if the base/runners can support it. If it was an HSR or similar the gains would be much greater.

Burnout91 above may have made 320whp with SLP/TPI, but ask him what his power is now with just a HSR swap.... its north of 380whp.

Burnout91

Unfortunately, last dyno run (3/13/10) it made, after tuning 365 / 353...lost some power somewhere, maybe with the EGR install...still investigating.

Blackdog36

iTrader: (3)

I think that your combo with 180's would make some great street power. I like the 180's since they have high port velocity, excellent exhaust/intake ratio at 80% and still flow a lot of air (260cfm@0.5"). They would match up with your current TPI setup. Plus if you ever upgraded to another intake, the 180's would still perform. With a high e/i ratio, in the future you can get a cam better suited to ratio for a bit more power.

Have you calculated your static and dynamic compression? I am not sure of your engine specs. I did calcs for my stock 350 with 180 heads. I came up with 10:1 static and 8.1 dynamic using a very slim gasket for quench. If you are going through trouble of getting aluminum heads, you should try to get static up to 11:1 and dynamic no higher than 8.5:1. It probably would be cheaper to have local shop mill down heads for you. Increasing static from 10:1 to 11:1 will increase power by 2.5%. Not as much as you would think but still worth it. Once you figure dynamic CR and engine temp, you can use graph below to determine octane rating. You probably will be around 91 octane.

http://www.empirenet.com/pkelley2/DynamicCR.html
http://www.popularhotrodding.com/tec...ech/index.html
http://www.popularhotrodding.com/tec.../photo_18.html

88fastgta

iTrader: (9)

this is all good info... i might ask them to do 60cc if 58 is a bit much..... but i already have the hotcam and like it... so ima stay with that.... i guess i'll get comp pro magums 1.6 non align rockers.. there like 159 last time i checked.... orr89rocz i dont know if im putting down 300whp... 2 years ago on my stock 130,000 plus miles l98 block i had the same combo except i had that 2032 cam and tired block of course and was running 87 gas and i only put down 215whp by 283wtq on the dyno. then it blew up on the dyno.. now i have a different block and much stronger bottom end.. i wonder why my numbers were so low..

norcalz28

iTrader: (13)

Bump for 180's, I'm running them on my new engine and once it's broken in I'll post some numbers.

355tpipickup

iTrader: (5)

any numbers to post?

norcalz28

iTrader: (13)

Not yet. I've only put a couple hundred miles on the motor so far. Shooting for at least 500 miles before I start to get on it more. Also the car runs a little on the warmer side right now, so I will get that ironed out and then post some numbers with the stock tune vs. most likely an Arizona TPI tune.

Will

dspencer24

iTrader: (3)

ill have mine in week finally got the tracking number when they say 6-8 weeks they really mean it. hurry up and get some miles on that thing!