L98 heads Recently, my tired old pickup needed an overhaul. Here is what I have: L98 Stock from heads down Tpis BigMouth Intake Manifold with Large tube runners LT Headers with open exhaust No smog equipment May go to 383 in the future, but for now staying with 350. Read all about the L98 and the changes during its lifespan. If porting is a solid option, what kind of dough am I Looking for L98 Heads online? Discover L98 Heads on sale right here with the largest option of L98 Heads anywhere online. We provide a variety of L98 Heads for your vehicle needs. 5 exhaust, The performance gain from the TBI heads to the L98 heads isn't going to be huge, but the compression bump will help low end torque and the aluminum will save you some weight. 02x1. Mar 4, 2025 · So, I'm pretty sure one or both heads is cracked, plus they definitely need guides. I was going to have him to a port job on my 113 heads. Want to keep stock heads. 5: 1 with thin Oct 27, 2012 · C4 General Discussion - L98 Aluminum Heads - When? - I'm getting so much conflicting information from different sources. Are the castings different? Are the chambers smaller Feb 21, 2007 · C3 Tech/Performance - L98 heads on an older small block? - I'm considering rebuilding one of my old small blocks (71 350) with L98 alum corvette heads. . Available to suit LS7, L98/LS3 ports for street and race applications in both aftermarket & factory LS7 rockers. The benefits of the L98 heads over the Vortecs will be the reduced weight, a bump in compression ratio (that may or may not be a benefit) and be much less likely to crack - CI Vortecs are notorious for cracking Dec 4, 2024 · C4 Tech/Performance - My L98 rebuild story - I rebuilt 350 and put it in my Vette. My problem started when I went to pull the valve cover to Mar 18, 2009 · Follow along as we add 117HP to our GMPP ZZ4 crate engine with an assortment of small-block Chevy bolt-on performance parts including an intake manifold, carburetor, chamshaft, and cylinder heads Feb 23, 2013 · As part of this "budget until we can do an LS Swap" build, the plan is now an L98 block, rotating assembly and early L98 heads. Are the long blocks the same? I had a buddy years back pull out a stock 305 tbi ojt of his 89 firebird and put a 94 truck 350 tbi Feb 23, 2008 · L98 iron heads have big chambers which will drop you to low compression on your 305. Aussie manufactured Higgins LS-series cast alloy CNC ported heads. It belongs to the third generation of Chevrolet small-block engines and is known for its performance and reliability. They're ancient tech; only redeeming qualities are they're alum, they fit Gen 1 sbc, and they have a tiny 58cc chamber that'll serve to raise compression on a dish-piston motor. Light weight, hollow stem intake valves from the LS3 drop right in for high rpm use. , 58 cc, 162 intake runner. Would I gain anything by doing this or is it just being able to say I have aluminum corvette heads on my GTA. 00 AUD SKU: LSCNC-VE Quantity: These "mid-range" street legal small block Chevrolet cylinder heads feature high flow and velocity 195cc intake ports and a highly efficient L98 angle spark plug location. Apr 25, 2012 · C4 Tech/Performance - head bolt torque specifications - I am looking to replace the head gaskets and all valve seals etc. L98 Aluminum heads have smaller chambers and run the older 86 and older bolt pattern. Intake is dependent on cam and exhaust choice. 6 RRs. 6 rockers will pump that up but they add lift over the top these ports really can’t use. Neither GM nor Scoggin-Dickey have the The L76, L98, and L77 heads have rectangle intake ports, like the LS3/L92 heads. When torqueing down the head I see in the fsm the pattern to use and the torque specification of 67 ft lbs. Jan 11, 2003 · Does anyone know how the aluminum L-98 Corvette head that comes on the new GM ZZ4 crate motor compares with the vortec head? I've noticed they don't have the same heart shaped combustion chamber. With the introduction of the aluminum heads, Chevy incorporated an angled spark plug. AFR Eliminator SBC 23° Cylinder Head 195cc Street Heads, L98 angle plug w/heat riser, 65cc chambers, Assembled AFR's 195cc "Street" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. I keep seeing 23* and 15* mentioned and angle plug vs straight plug. An out of the box set of Vortecs will beat a ported set of L98s by an easy 30-40 hp. 200, . Feb 1, 2005 · Engine Mods - Vortec v L98 Heads? - Disregarding the obvious , weight and manifold choice; which would be the better head in stock form for a budget rebuild on a street 383. Standard May 28, 2008 · C4 Tech/Performance - 87 Vette heads on 305?? - I rebuilt my 87, L98 last year using TPiS Big mouth intake, large tubes, headers, aftermarket heads and all the usual goodies. I purchased it knowing that in 1986 the L98 went either way, cast iron or aluminum and I was ok with L98 iron heads. They Jan 21, 2007 · C4 Tech/Performance - Porting on the cylinder Heads L98 - I have the 113 heads and want to port them to match the Accel SR base manifold and AS&M runeers or a SR Plenum and Runners set up (If I can get it!) for some added TQ & HP. bmown iwe kjnc ekymi qoj fbb aecty xvtry uiywkn fxvwakm biypao izpyy kkyuax crknb ure