I bought a set of 1 3/4 SLP's to use and the set of heads I had at the time, protoplines w/ angle spark plugs wouldn't work with the headers. The spark plugs would hit the headers, so I got rid of the protoplines. I am going to buy a set of new AFR's and want to know which type is going to be the best, straight or L98? I have done searches and can't tell which is going to be better. Thanks.

 

i would think that you need the L98s,
by the way i Love your sig.

 

L98, I have straight and I had to dent 2 tubes...........

 

I ran straight plug AFR 195's with SLP 1.75's for six years with no problems as far as plug to header clearance.

 

Do not get the L98-angle AFR heads, they will not work with our headers. That design is for L98 Corvettes. You need either the regular angle or straight angle heads.

By the way, in your sig, its spelled "obscene".

 

ok. which is it? I am lost now.

 

I'm running SLP 1 3/4 with the AFR 195 angle plugs heads
and your probably going to run into a problem with #8
plug wire boot

Had to dimple tube and still a problem. Straight plugs
would have been worse. Ended up having to use 2" header
wrap with stainless header wrap straps. Had to use a couple layers. It looks neat and proffesional and not patched up. #5 also kind of close.

Probably have to move brake lines on drivers side a little
and could have steering shaft issues but solvable.
Price you pay for larger tubes in these cars.
HTH
I'm also having to use the Autolite shorty header plug.
later

Irocing

 

were yours L98 angle or just angle?

 

AFR 1040-
L98 Angle.

Later

Irocing

 

I had afr 195 heads with l98 angle plugs and the old 1 3/4" slp headers and even after the dents I was still burning wires.

 

This doesn't make sense at all, everyone here says that every type works, and every type doesn't work. Crap! lol

 

Edit: I was confused. L98 angle DOES work. That is what you want. Ignore below.

For sure the L98 angle does not work. Straight and regular angle should work. Why not call AFR and ask? Or even better, get yourself a set of Trick Flows for less money and hassle and almost the same performance?

 

I will call them, and if you look, trick flows cost about the same.

 

or do what I did.... sell the slp headers and get the hooker longtubes. after all your after more hp do it right

 

AFR 190s with angle plug (NOT L98) works very well with 1-3/4" SLPs. Never had to dimple anything nor did I have any problems with 90-degree wire boots (Taylor). I do recall one boot did get sufficiently close to the header tube that I rounded the corners of the #8 boot (look closely at the pic). I also routed the wires under the headers. Sorry, no pics with headers installed, only without. I did so after the engine was dropped in.

 

Not quite. Trick Flows are ready to go out of the box for $1350. With AFR's, if you're bolting them on a older SBC for racing, you're fine. But for a newer roller SBC for street use, you need to pay for a host of upgrades that end up pushing the price much higher. I know more than one person who spent more than $2000 for their AFR 195 heads, after paying for the upgrades to bolt them onto a TPI engine.
AFR makes a great head, they are the best flowing and make the most power, however they are also the most expensive.

 

I spent 1300 and change for my 195s and still trying
to figure out what upgrades your talking about.

For 2000 bucks you can get a set of heads that could
flow enough for 1000 ponies

Later

Irocing

 

CNC porting, upgraded springs, correct temp sensor hole, angle milling for better compression ratio, etc etc.

 

You can say the same thing for the Trick Flows

Later

 

I think that AFr has fixed some of the things that people were mad about before, now the heads come with springs LS style beehive springs that are good to .600 and come with all the sensor holes drilled and should support an easy 500hp with their street heads for 1399. I was looking at trick flows untill the new eliminator heads came out. I had read on here about their heads costing 2000. There was no way I was going to spend that much, but I can swing 1400.

 

Well not to confuse you but Im running the Trick Flow heads with the L98 angle plugs and all but #8 clear just fine. Im even running the Taylor 409 plug wires and standard length plugs! But on number 8 I have a shorty plug and trimmed up my plug boot some to get about 1/8 gap on the tube and boot (no denting) Just how it worked out with mine anyways.

 

I have straight AFR 190s and 1 3/4 SLPs.

The #3 cylinder is difficult to get a plug in. Previously, I've used Bosch plugs with the screw tip taken off and then put the screw tip back on after the plug was installed. Now I'm using shorty plugs to get more space for the plug wire. The plug wire would still be very close to the header so I use Taylor wire covers.

Don't know if the angled heads work better.

 

Ok, anyone has pictures of SLP with AFR

Straight?
Angled?
L98 Angled?

Come on now

 

Which shorty Autolite plug is that?

 

Autolite 3926

HTH

Later

 

THANKS!!!!
----------
What shorty plugs are you using? I'm trying to compile a list of compatible plugs for when my 195's come in next month

 

I talked to the guy I bout the headers from and he was using L98 angle plugs. I saw that you posted a while back to use L98 angle or straight. I was wondering if you found out something to change your mind. I am not trying to start anything. Just want to make sure I get the right ones. For everyone that says straight, angle, L98 angle works, theres another person that says each don't. That doesn't make a damn bit of sense to me.

 

https://www.thirdgen.org/forums/exha...ght=AFR%2C+SLP

heres a link for pics w/ AFR angle plugs and 1 3/4 SLPs. Thats exactly what my protoplines looked like. Thats why I got rid of them. There should be a sticky about this or something.

 

I think he got the angles mixed up cause in the beginning of this year he said in one of his posts

If you want to wait a month I'll let you know how the straight angle works out. I have a set of 195 eliminators on order that I'am hopeing will fit my SLP 1 3/4 headers.

 

Yeah i think he got them mixed up. As I mentioned I talked to the guy I bought the headers from and he said L98. I remembered I have a set of straight angle plug heads in the garage. I bolted the SLP's up to them and there are ZERO problems. On #8 you might have to dimple it a little. Maybe. The set I have are already dented. There is atleast 1inch for plug wire clearance on each plug and I am using MSD plug wires. So far a can say angle does not work, straight does. L98 I can't personally say.

I can take pics of the SLP's on w/ straight if anyone would like to see them.

 

Looking at the stock heads you would say there a straight angle head and they fit fine for me.

 

And I should be able to tell you about the AFR L98 angle plug heads (part #1040) by the end of the weekend. Maybe sooner if I can get time to mock them up on a block sitting in the garage....

 

Yup, straight should be fine. I will get some pics tonight.

 

I was confused. L98 angle does fit, regular angle does not. Ignore below.

I dont know why I would say to get the L98 angle, unless it was before my friend with AFR heads and SLP 1 3/4" headers could not make them fit. If L98 angle doesnt fit and regular angle doesnt fit, to me its just another reason why AFR heads are overpriced and not worth it.

 

Whatever heads you use, check with Slp for fitment with the 1 3/4 headers. I went with the STRAIGHT plugs and there is still very little clearance. I had to use the LT1 metal plug shields to prevent the Boots from burning on the rear plugs.
That solved the problem

 

Please do so we all can find a final answer to this question

Ill post some pic's of mine when they come in to.

 

I've been running the SLP headers with AFR 195 heads for some time now and have yet to have "any" problems with fitment or plug access. My heads are the L98 angle plug type and I use autolite plugs 3923 or 3910 with no problems. Kevin 91Z has seen the car.

 

You might want to have a little talk with your buddy Kevin then, he seems a little confused

 

It looks like I'm not going to have any problems with the SLP shorty headers on the #1040 L98 angle plug 195 Eliminators either....

 

Here are some pics of my AFR 195's with L98 angle plugs and SLP 1 3/4" headers. It's tight in a few places and I'm ordering some boot sleeves to keep some of the heat off of the wires but I didn't have to dimple the headers anywhere.
Hope this helps.

 

And the last pic...

 

What we need to do is post pics in this thread and have it made a sticky. As many people that use SLP's need to know this. And since depending on who you ask depends on what setup works. Pics would be good.
L98 angle works
Straight works
Angle DOES NOT WORK!

I can get pics of the SLP's on some 461 double hump heads w/ straight plugs and Trick Flow G1 heads which look like they have the L98 angle.

If anyone else has them, pics would be great.

 

i have afr 190's l98 style with slp 1 3/4" shorty headers with no plug access problems.

If you buy AFR heads i would recommend you replace the rocker studs, one of mine broke after a few months, the arp's are noticably higher quality

 

Do you have the older AFR's or the new eliminator heads?

Also, performance wise, which is better, straight or L98? or does it matter?

 

Performance wise, it shouldn't make any difference.

 

I purchased mine in 2002. Just a note, i HAD the strait plug heads but they did NOT work with the SLP's. One plug was just about touching with no boot and others touched with the boot. AFR recommened the L98 style, i recommend you purchase from them directly. My first set came from a dealer and were "defective" (long story you might be able to search it here). After 6 weeks on the phone with AFR getting treated like feces, Rick Spearling (president) contacted me and replaced the heads, then a few thousand miles later i was stuck on the Whitstone bridge at 2:00 am with a broken rocker stud. They look like chinese crap, especially compared to the 30 dollar speed shop purchased ARP's i replaced them with.

Other than that the heads have ben great and seem to preform really well although i have nothing to compare them to.

 

If I remember correctly. When I ordered my 195's a few years back AFR asked me what headers I was running . When I said SLP's they suggested to go with the L98 angle because the SLP headers were mainly designed around the L98 angle plug heads for 3rd gen cars.

 

Well I got my AFR eliminators 195's #1036 in with straight plug heads, hopefully I'll have some pic's for you guys by the weekend.

 

And I will have my AFR eliminators 195's #1038 L98 angle plug heads next week, hope it works out for both of us.

 

keep us updated so I can place a order soon